Comparison of two time-variant forced eddy-permitting global ocean circulation models with hydrography of the Scotia Sea

first_imgA comparison between hydrographic observations and output from two realistically forced z-level global ocean circulation models (OCCAM and POCM_4C) in the Scotia Sea, South Atlantic, is described. The study region includes the southern part of the Antarctic Circumpolar Current (ACC) and the northern Weddell Gyre. Despite similar formulations, the models have different strengths and weaknesses. OCCAM simulates well the horizontal circulation around South Georgia but loss of Antarctic Bottom Water distorts the mean circulation in the central Scotia Sea. A poorer bathymetric dataset in POCM_4C means that the circulation is not adequately topographically steered leading to greater zonal flow and a southward shift of the fronts of the southern ACC. In a comparison with sea surface height variability data, OCCAM overestimates and POCM_4C underestimates the maximum values. Both models have higher background variability than the satellite data. Mean monthly model output is compared with a meridional hydrographic section from the study region. The regional water masses at the time of the hydrographic section (April 1995) are recognisably reproduced in both models despite some discrepancies. The surface waters are too saline in OCCAM (by 0.12–0.40) and too warm in POCM_4C (by>2 °C) suggesting problems with the air-sea surface heat and freshwater fluxes used to force both models and the models’ vertical mixing parameterisations. Anomalous mixed layer properties in winter lead to inaccurate Winter Water characteristics in both models. Slumping of Circumpolar Deep Water occurs in OCCAM, associated with the loss of the bottom water. Subsurface restoration to climatology at buffer zones prevents this slumping in POCM_4C although the densest waters are not reproduced. The models overestimate the baroclinic transport of the section by up to a factor of two and simulate a significant barotropic component of transport. Overall, both models can be used in this region in ways that utilise their strengths. Further improvements are likely to come from better bathymetric representations, surface fluxes, and bottom water formation processes, elimination of spurious diapycnal mixing, improvement of vertical mixing parameterisations, and higher resolution.last_img read more

A most isolated benthos: coastal bryozoans of Bouvet Island

first_imgBouvet Island is, uniquely, thousands of km from the next nearest land, even other islands. Its Southern Ocean location, isolation and the exposure of its surrounding cliffs have resulted in only rare visits by ship and its coastal marine fauna is little known. For animal taxa with non-pelagic larvae, such as cheilostome bryozoans, the shelf environment of Bouvet is a rare example of isolated oceanic communities. Agassiz trawl samples of the 2003 ANT XXI-2 cruise of the PFS Polarstern collected a total of 18 species of cheilostomes at four sites around Bouvet Island. Of these only four had been reported before amongst the 20 species of cheilostome previously known from this locality. Furthermore eight of the genera are reported for the first time from Bouvet Island. The assemblages were dominated by Austroflustra vulgaris, and in one case Nematoflustra flagellata. The bryozoan fauna seems to be depauperate and bears only low (32% at species and 46% at genus level) similarity to any location within 3,000 km. Its species composition is typically Southern Ocean, with most affinity to the Scotia Arc and Weddell Sea whereas at generic level it is most similar to the Subantarctic Prince Edward Archipelago.last_img read more

A new global biome reconstruction and data-model comparison for the Middle Pliocene

first_imgAim To produce a robust, comprehensive global biome reconstruction for the Middle Pliocene (c. 3.6–2.6 Ma), which is based on an internally consistent palaeobotanical data set and a state-of-the-art coupled climate–vegetation model. The reconstruction gives a more rigorous picture of climate and environmental change during the Middle Pliocene and provides a new boundary condition for future general circulation model (GCM) studies. Location Global. Methods Compilation of Middle Pliocene vegetation data from 202 marine and terrestrial sites into the comprehensive GIS data base TEVIS (Tertiary Environmental Information System). Translation into an internally consistent classification scheme using 28 biomes. Comparison and synthesis of vegetation reconstruction from palaeodata with the outputs of the mechanistically based BIOME4 model forced by climatology derived from the HadAM3 GCM. Results The model results compare favourably with available palaeodata and highlight the importance of employing vegetation–climate feedbacks and the anomaly method in biome models. Both the vegetation reconstruction from palaeobotanical data and the BIOME4 prediction indicate a general warmer and moister climate for the Middle Pliocene. Evergreen taiga as well as temperate forest and grassland shifted northward, resulting in much reduced tundra vegetation. Warm-temperate forests (with subtropical taxa) spread in mid and eastern Europe and tropical savannas and woodland expanded in Africa and Australia at the expense of deserts. Discrepancies which occurred between data reconstruction and model simulation can be related to: (1) poor spatial model resolution and data coverage; (2) uncertainties in delimiting biomes using climate parameters; or (3) uncertainties in model physics and/or geological boundary conditions. Main conclusions The new global biome reconstruction combines vegetation reconstruction from palaeobotanical proxies with model simulations. It is an important contribution to the further understanding of climate and vegetation changes during the Middle Pliocene warm interval and will enhance our knowledge about how vegetation may change in the future.last_img read more

Identifying the origins of fishing gear ingested by seabirds: a novel multivariate approach

first_img* 1.The global decline of albatrosses (Diomedidae: Procellariiformes) is thought to have occurred largely as a direct result of fishery-related mortality. Albatrosses and other large petrels interact with fisheries in several ways, including scavenging used bait and discarded offal, which may contain hooks.* 2.Hooks that are ingested by breeding birds are often fed to chicks which subsequently regurgitate them shortly before fledging.* 3.In this study a series of mathematical (cladistic, cluster and principal components) analyses are applied to a sample of 241 items of fishing gear (hook, snood and hook/snood unit) collected from seabird nest sites on Bird Island, South Georgia, and 44 reference gear items provided by four South Atlantic regional fisheries.* 4.The five separate analyses failed to assign most gear to a particular fishery or to identify any consistent annual trends. The homogeneous nature of the material, which was largely derived from the same manufacturers, meant that gear origin could not be determined. This suggests that hooks found at seabird colonies in this, and potentially other regions, will be of limited use in identifying offending fisheries, unless operators are obliged to deploy gear with unique marks in the future.* 5.Nevertheless, it is suggested that this approach should work effectively where birds interact with a range of fisheries targeting different species using variable gear. This study therefore represents an innovative approach to the characterization of lost fishing gear with potentially widespread application. Copyright © 2010 John Wiley & Sons, Ltd.last_img read more

The distribution, abundance, status and global importance of giant petrels (Macronectes giganteus and M. halli) breeding at South Georgia

first_imgInformation on the status of giant petrels breeding at South Georgia was previously based on studies at a small number of the archipelago’s breeding sites. Here, we report the results of the first complete archipelago-wide survey of breeding northern Macronectes halli and southern M. giganteus giant petrels in the austral summers 2005/2006 and 2006/2007. We estimate that 15,398 pairs of northern and 8803 pairs of southern giant petrels bred at South Georgia. These are the largest and second largest populations at any island group, representing 71.0% and 17.3%, respectively, of updated global estimates of 21,682 pairs of northern and 50,819 pairs of southern giant petrels. A comparison of counts at locations surveyed in both 1986/1987–1987/1988 and 2005/2006–2006/2007 indicated increases of 74% and 27% in northern and southern giant petrels, respectively, over the intervening 18–20 years. The greater increase in northern giant petrels was likely influenced by the recovery of the Antarctic fur seal Arctocephalus gazella population at South Georgia, which provides an abundant but transient food resource (carrion). Due to allochrony, this provides greater benefits to northern giant petrels. The large, and increasing, population of king penguins Aptenodytes patagonicus at South Georgia also provides a potentially valuable food resource. The flexible and opportunistic foraging behaviour of giant petrels has contributed to their positive population trends. Other, more specialised, seabirds such as albatrosses have declined at South Georgia in recent decades mainly because of problems at sea, compounded by greater predation pressure from the increasing populations of giant petrels.last_img read more

Utah State Records Highest Learfield Cup Finish in School History

first_img FacebookTwitterLinkedInEmailLOGAN, Utah-Monday, the Utah State athletics department revealed it finished 78th in the Learfield Directors’ cup standings, the highest-such finish in program history.The Learfield directors’ cup’s history dates back to 1993 and since then, it is awarded to the nation’s best overall collegiate athletics program in Division I, Division II, Division III and NAIA.The 2017-18 winner is the Stanford Cardinal of the Pac-12 as they won titles in men’s and women’s soccer, women’s tennis and women’s swimming-diving.The Aggies, who posted 266.25 points to place 78th in a class of 292 eligible Division I schools.They bested Power 5 schools such as Washington State (80th place), Boston College (95th place), Rutgers (107th place), Pittsburgh (111th place) and Georgia Tech (121st place).Additionally, BYU placed 45th overall in the standings, Utah was 61st, Southern Utah finished 91st, Weber State finished 201st and Utah Valley placed 211th.In Division II, Dixie State placed 184th overall in the standings, out of 268 eligible schools. July 2, 2018 /Sports News – Local Utah State Records Highest Learfield Cup Finish in School History Tags: Boston College/BYU/Dixie State/Georgia Tech/Learfield Directors’ Cup/Pittsburgh/Rutgers/Southern Utah/Stanford Cardinal/Utah/Utah State Athletics/Utah Valley/Washington State/Weber State Written by Brad Jameslast_img read more

Prep Sports Roundup: 1/24

first_img Written by Tags: Roundup FacebookTwitterLinkedInEmailBoys BasketballRegion 14DELTA, Utah-Ty Allred posted 20 points and 6 rebounds on 8-14 from the field as the Juab Wasps upset the Delta Rabbits 68-62 Friday at the Palladium in Region 14 boys basketball action. Jake Bailey added 13 points on 3-6 from the field with Brendon Allred (13 points, 3-5 shooting) and Kollin Robertson (11 points, 7 rebounds) also scoring in double figures for the Wasps. Juab improved to 7-10 by shooting 55.3 percent from the field for the game.Derek Smith had 34 points on 16-17 from the foul line for the Rabbits in the loss as they fell to 10-7 on the season.Both squads are at home Wednesday as the Rabbits host Maeser Prep and Juab draws North Sanpete at Nephi.SPANISH FORK, Utah-Grady Thompson and Konner Clark posted 15 points apiece and the Manti Templars stymied American Leadership 56-42 in Region 14 boys basketball action Friday. Jonah Larsen and Norman Rentschler had 16 points apiece in the loss for the Eagles.MT. PLEASANT, Utah-Dallon Steadman led the way with 14 points and 11 rebounds as the North Sanpete Hawks edged Union 60-59 Friday in overtime in Region 14 boys basketball action Friday. Keaston Young had 20 points in defeat for the Cougars.Region 12CASTLE DALE, Utah-Brax Jensen posted 21 points and the No. 3 Emery Spartans upset No. 2 Richfield 54-53 Friday in Region 12 boys basketball action. Josh Thalman’s 17 points led the Wildcats in defeat.PRICE, Utah-Brandt Williams amassed 32 points and the South Sevier Rams smacked Carbon 72-59 in Region 12 boys basketball action Friday. Brady Gagon had 19 points in the loss for the Dinos.Region 16SALINA, Utah-Gavin Davis netted 14 points and the Duchesne Eagles edged North Sevier 53-51 in Region 16 boys basketball action Friday. Burke Mickelsen’s game-high 21 points led the Wolves in the loss.GUNNISON, Utah-Creed Mogle led the way with 9 points as the Gunnison Valley Bulldogs dismantled Altamont 37-26 Friday in Region 16 boys basketball action. Cordale Taylor had 10 points for the Longhorns in the loss.Region 18BEAVER, Utah-Cade Szymanski posted 17 points and the Kanab Cowboys humbled Beaver 54-50 in Region 18 boys basketball action Friday. Ky Brown led the Beavers in the loss with 20 points and 6 rebounds.Non-RegionMT. PLEASANT, Utah-Michael Loftin and Mike Saunders had 20 points apiece and the Wasatch Academy Tigers bludgeoned Juan Diego 100-62 in non-region boys basktetball action Friday. Talon Valdes netted 22 points on six 3-pointers in the loss for the Soaring Eagle.Girls BasketballRegion 20TROPIC, Utah-Brooklyn Syrett and Oakley Johnson had 11 points apiece as the Bryce Valley Mustangs downed Valley 35-27 in Region 20 girls basketball action Friday. Esther Cox had 11 points in defeat for the Buffaloes.JUNCTION, Utah-Heidi Jensen stepped up with 18 points and the Piute Thunderbirds smacked Wayne 55-51 Friday in Region 20 girls basketball action. Abby Stevens led the Badgers in the loss with 15 points.ESCALANTE, Utah-The Panguitch Bobcats humbled Escalante 35-21 in Region 20 girls basketball action Friday.HILDALE, Utah-The Milford Tigers smacked Water Canyon 59-44 Friday in Region 20 girls basketball action. January 24, 2020 /Sports News – Local Prep Sports Roundup: 1/24 Brad Jameslast_img read more

VAALCO announces successful workover at South East Etame 2H Well and first quarter 2020 Production of 4,944 NRI BOPD

first_img During the first quarter of 2020, the company brought two new wells online. (Credit: Pixabay) VAALCO Energy, Inc. (NYSE: EGY; LSE: EGY) (“VAALCO” or the “Company”) today provided an operational update including the successful completion of the South East Etame 2H workover and the release of the drilling rig used in its highly successful 2019/2020 drilling program.HighlightsSuccessfully completed a planned workover on the South East Etame 2H well and restored 2,400 gross barrels of oil per day (“BOPD”), 650 BOPD net revenue interest (“NRI”)(1) to VAALCO;Increased total Company production to approximately 5,400 BOPD NRI or 6,200 working interest (“WI”)(2) BOPD following the successful workover;Released the Vantage Drilling International Topaz jackup drilling rig on April 9, 2020;Produced 4,944 BOPD NRI, or 5,683 BOPD WI in the first quarter of 2020, near the high end of first quarter guidance (4,700 – 5,000 NRI);Reported sales volumes of 294,000 barrels of oil, net to VAALCO for the first quarter of 2020 as compared to 318,000 barrels for the fourth quarter of 2019;Reaffirmed full year 2020 production guidance at 4,400 to 5,000 BOPD NRI (being 5,100 to 5,750 BOPD WI), andExperienced no material disruptions in operations to date due to current worldwide COVID-19 crisis. The workover on the South East Etame 2H well successfully restored 2,400 gross BOPD All NRI production rates and volumes are VAALCO’s 31.1% WI less 13% royalty volumes.All WI production rates and volumes are VAALCO’s 31.1% WI.Cary Bounds, Chief Executive Officer, commented, “We continue to execute operationally and have restored 2,400 gross BOPD of production with the successful workover of the South East Etame 2H well. We have now released the Vantage drilling rig after completing the successful 2019/2020 drilling campaign and executing two workovers that restored production from wells that were shut in due to electronic submersible pump (“ESP”) failures. We have elected not to pursue any additional preemptive workovers at this time. We are proud of the highly successful and transformational drilling program that has added meaningful production and significantly reduced our operating costs per barrel. For the first quarter 2020, production was 4,944 BOPD NRI, which is 35% greater than our Q4 2019 average production and is our highest production since Q4 2015. This gives us confidence to reaffirm our full year 2020 production guidance of 4,400 to 5,000 BOPD NRI. In addition, our strong production has helped to lower our operational breakeven cost of approximately $31.00 per barrel and, coupled with our current hedge portfolio, positions us well to navigate through the uncertain macro environment we face today. Thus far, VAALCO’s operations have not been disrupted by the global COVID-19 pandemic, and we have managed through the logistical challenges that we have faced since the outbreak. VAALCO continues to put the safety of our workers and local stakeholders first and has contingency plans in place in the event that we are directly impacted. We remain committed to capital efficiency, controlling costs and optimizing production to ensure VAALCO generates long-term value for our shareholders.”Operational UpdateThe workover on the South East Etame 2H well successfully restored 2,400 gross BOPD, or 650 BOPD NRI to VAALCO, in line with the production level prior to when the ESP failed in early March 2020. VAALCO released the Vantage rig on April 9, 2020 and does not currently expect to perform any additional workovers in order to better preserve cash flow in the current uncertain environment.With the completion of the 2019/2020 drilling campaign and the successful South East Etame 2H workover, total Company production is approximately 20,000 gross BOPD or 5,400 BOPD NRI to VAALCO. During the first quarter of 2020, the Company brought two new wells online, experienced normal operational downtime associated with simultaneous production and drilling/completion operations and brought production back online as a result of performing two workovers. Production for the first quarter of 2020 was 18,298 gross BOPD or 4,944 BOPD NRI to VAALCO.During the first quarter of 2020, VAALCO had two liftings, one in January and one in February, but the next lifting for 85,000 barrels of oil that was scheduled for March was delayed to April 1st due to poor weather conditions. As a result, the sales volumes for the quarter were 294,000 barrels of oil, net to VAALCO as compared to 318,000 barrels for the fourth quarter of 2019, despite the higher production in the first quarter of 2020.Thus far, VAALCO’s operations have not been materially affected by the COVID-19 pandemic. The health and wellbeing of employees remains paramount, and as such, VAALCO continues to work with its regional partners to ensure the Company operates as safely as possible, applying best practice protocols as instructed by the respective governments. Source: Company Press Releaselast_img read more

ConocoPhillips to axe 500 jobs at Houston headquarters

first_img ConocoPhillips headquarters in the Energy Corridor area of Houston, US. (Credit: WhisperToMe/Wikipedia) US-based independent oil producer ConocoPhillips is reportedly planning to axe up to 500 jobs at its headquarters in Houston, as the demand for oil declines due to the coronavirus pandemic.The move is aimed at cutting costs and prepare for the completion of the $9.7bn acquisition of US shale producer Concho Resources.The firm intends to notify the affected employees as early as 01 February 2021. These employees will receive 60-days advance notice.The company was quoted by Bloomberg as saying: “The process to determine the exact number of impacted employees is ongoing.“However, we anticipate the number of reductions in Houston could meet the threshold of 500 or more.”ConocoPhillips reduced production by 22%As a result of price crash due to the Covid-19 pandemic, ConocoPhillip has reduced its production by 22% over the last one year, requiring fewer employees, the news agency reported.ConocoPhillips spokesman John Roper was quoted by Reuters as saying: “We have been transparent with employees that targeted workforce reductions in certain areas of our business may be necessary from time to time to align organizational capacity with expected future activity levels.”In October this year, ConocoPhillips signed a deal to acquire Concho Resources in an all-stock transaction.ConocoPhillips expects the deal to increase its output capacity to more than 1.5 million barrels of oil equivalent (boe) per day, making it the largest independent oil and gas company and significantly boosting its operational footprint in the prolific Permian Basin region.The combined entity will have a nearly $60bn enterprise value, and an asset base comprising around 23 billion barrels of oil equivalent. As a result of the price crash due to the Covid-19 pandemic, ConocoPhillips has reduced its production by 22% in the past one yearlast_img read more

Awards honour industry’s best auctioneers

first_imgNAVA has presented Katie Semmens (right) of land and property firm Clive Emson with its prestigious Auctioneer of the Year award – the top honour at the body’s annual awards ceremony.Semmens impressed the judges with “her outstanding professional auctioneering skills, including handling difficult bidding situations whilst maintaining genuine customer empathy, and adding a good touch of humour to help lift the bid levels”, according to NAVA.The President’s Award was presented to Steven Denley-Hill, who has dedicated much of his professional life to NAVA and held several influential roles including president, chairman and CEO.The Community Award was presented to Symonds & Sampson as the company that best demonstrated their commitment to corporate and social responsibilities within the community.This year’s Property Auction House of the Year award was handed to Network Auctions “for demonstrating outstanding customer service, robust business strategy, effective marketing, profession involvement and best practice.”Phil Arnold, President, NAVA, said, “This event is an industry institute. Now in its fifth year, it’s a great way for us to show off and congratulate the great work conducted by valuers and auctioneers across the whole business.“We were extremely impressed with this year’s entrants – the standard was very high,” he added.Meanwhile, Auction House ran its very first property auction in Nottingham last week in association with HEB Chartered Surveyors.The sale, which was held at the Doubletree by Hilton Hotel in Nottingham, saw 11 of the 12 lots offered under the hammer sold, collectively raising almost £1 million.The company’s decision to join forces with Matt Hilton and his colleagues at HEB in Nottingham increases Auction House’s network to 40 auction rooms.Auction House’s Founding Director Roger Lake (right) said, “It’s good to add a Nottingham sale room to our network and to have teamed up with Matt Hilton and his colleagues at HEB. This new addition to our ranks will strengthen our presence in East Midlands, and make the brand active in a territory where sale by auction is already popular.”Auction House became the first property auction company in the country to pass the 2,000 lots sold milestone for 2015 in September – and did so two weeks earlier than last year.Auctioneer Matt Hilton (left) said, “We’ve watched the growth of Auction House in recent years and have been impressed by their core philosophy of selling local properties close to home – something which is good for our local, regional and national clients. We’re delighted to have joined the brand and look forward to increasing our number of entries, now that we can provide a whole of market service.”industry’s best auctioneer NAVA Auctioneer of the Year award Awards October 14, 2015The NegotiatorWhat’s your opinion? Cancel replyYou must be logged in to post a comment.Please note: This is a site for professional discussion. Comments will carry your full name and company.This site uses Akismet to reduce spam. Learn how your comment data is processed.Related articles BREAKING: Evictions paperwork must now include ‘breathing space’ scheme details30th April 2021 City dwellers most satisfied with where they live30th April 2021 Hong Kong remains most expensive city to rent with London in 4th place30th April 2021 Home » News » Associations & Bodies » Awards honour industry’s best auctioneers previous nextAssociations & BodiesAwards honour industry’s best auctioneersAnd the winners are…The Negotiator14th October 20150674 Viewslast_img read more