Warming of Antarctica As a Degassing Consequence
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F!L3ljnew CITATIONS in COASTAL TOPICS • a
·/f1!f!!II:. f!l3lJNEW CITATIONS IN COASTAL TOPICS • A ., Addis, R.P.; Garstand, M., and Emmitt, G.D., J9R4. Downdrafts from tropical oceanic cumuli. Boundary-Layer Meteorology. 28(1-2).23-49. Admiraal, W.; Laane, R.W.P.M., and Peletier, H., 1984. Participation of diotoms in the amino-acid cycle of coastal waters uptake and excretion in cultures. Marine Ecology - Prowess Sf-ries. I ~(:1I. :lO:1-306. Ahmed, 8.T.; King, 8. L., and Clayton, J.R., 1984. Organic-mattler diagenesis in the anoxic sediments of Saanich Inlet. British Columbia. Canada - a case for highly evolved community interactions. Marine Chemistry. 14(3),233-252 Ajebouri, M.M. and Trollope, D.H., 1984. Indicator hacte'ia in fresh water and marine moUusks. HydrobioloRY, 111 (2), 9:l-1 02. Alam, M.; Piper, D.J.W., and Cooke, H.B.8., 198:\. Late Quaternarv stratigraphy and paleooceanography of the Crand Banks continental margin, eastern Canada. Boreas. \2(41. 25:1-2GI AIdabas, M.A.; Hybbard, F.H. , and McManus, J., 1984. The shell of Mytilus as an indicator of zonal variations of water quality within an estuary. Estuarine. Coastal and SI"'lf Science. I H(:ll. 2G:I-270. Allen, D.M., 1984. Population dynamics of the mysid shrimp Mysidop.,i., bili,-loll'i Tattersall. W.M. in a tern perate estuary. Jour nal of Crustacean Biology_ 4( 1).25':14 Allen, L.G. and Demartin, E.E., 198:\. Temporal and spatial patterns of nearshore distribution and abundance of the pelagic fishes off San Onofre Oceanside. Califol1lia. Fishery Rulll·tin, RI(:11. -
Antarctic Peninsula
Hucke-Gaete, R, Torres, D. & Vallejos, V. 1997c. Entanglement of Antarctic fur seals, Arctocephalus gazella, by marine debris at Cape Shirreff and San Telmo Islets, Livingston Island, Antarctica: 1998-1997. Serie Científica Instituto Antártico Chileno 47: 123-135. Hucke-Gaete, R., Osman, L.P., Moreno, C.A. & Torres, D. 2004. Examining natural population growth from near extinction: the case of the Antarctic fur seal at the South Shetlands, Antarctica. Polar Biology 27 (5): 304–311 Huckstadt, L., Costa, D. P., McDonald, B. I., Tremblay, Y., Crocker, D. E., Goebel, M. E. & Fedak, M. E. 2006. Habitat Selection and Foraging Behavior of Southern Elephant Seals in the Western Antarctic Peninsula. American Geophysical Union, Fall Meeting 2006, abstract #OS33A-1684. INACH (Instituto Antártico Chileno) 2010. Chilean Antarctic Program of Scientific Research 2009-2010. Chilean Antarctic Institute Research Projects Department. Santiago, Chile. Kawaguchi, S., Nicol, S., Taki, K. & Naganobu, M. 2006. Fishing ground selection in the Antarctic krill fishery: Trends in patterns across years, seasons and nations. CCAMLR Science, 13: 117–141. Krause, D. J., Goebel, M. E., Marshall, G. J., & Abernathy, K. (2015). Novel foraging strategies observed in a growing leopard seal (Hydrurga leptonyx) population at Livingston Island, Antarctic Peninsula. Animal Biotelemetry, 3:24. Krause, D.J., Goebel, M.E., Marshall. G.J. & Abernathy, K. In Press. Summer diving and haul-out behavior of leopard seals (Hydrurga leptonyx) near mesopredator breeding colonies at Livingston Island, Antarctic Peninsula. Marine Mammal Science.Leppe, M., Fernandoy, F., Palma-Heldt, S. & Moisan, P 2004. Flora mesozoica en los depósitos morrénicos de cabo Shirreff, isla Livingston, Shetland del Sur, Península Antártica, in Actas del 10º Congreso Geológico Chileno. -
1 We Thank the Referees for Their Careful Review
We thank the referees for their careful review and thoughtful comments. Below please see our point-by-point responses and changes made to the manuscript. Referee report #1 Thank you for responding to my comments. It is now clearer what is going on, but some additional enhancements are desirable. You need to state clearly in the abstract and probably in the manuscript as well that you are using pre-industrial conditions to examine sea-ice generated Antarctic precipitation variability in the absence of anthropogenic forcing. This should appear explicitly in the first sentence of the abstract, I think, rather than being implicit here and throughout the manuscript. I am recommending minor revisions, but think that this is a very important aspect to address comprehensively to make the intent and methodology of your extensive work obvious to the reader. Done as suggested. Now the first sentence of the abstract reads “We conduct sensitivity experiments using a general circulation model that has an explicit water source tagging capability forced by prescribed composites of pre-industrial sea ice concentrations (SIC) and corresponding sea surface temperatures (SST) to understand the impact of sea ice anomalies on regional evaporation, moisture transport, and source–receptor relationships for Antarctic precipitation in the absence of anthropogenic forcing.” A similar statement is also made in the summary paragraph of the Introduction section: “In this study, we aim to understand the impact of SO sea ice anomalies associated with internal variability (in the absence of anthropogenic forcing) on local evaporation, moisture transport and source–receptor relationships for moisture and precipitation over Antarctica using a GCM that has an explicit water source tagging capability.” Section 3.2: You attribute southerly katabatic flow to the polar high. -
Data Structure
Data structure – Water The aim of this document is to provide a short and clear description of parameters (data items) that are to be reported in the data collection forms of the Global Monitoring Plan (GMP) data collection campaigns 2013–2014. The data itself should be reported by means of MS Excel sheets as suggested in the document UNEP/POPS/COP.6/INF/31, chapter 2.3, p. 22. Aggregated data can also be reported via on-line forms available in the GMP data warehouse (GMP DWH). Structure of the database and associated code lists are based on following documents, recommendations and expert opinions as adopted by the Stockholm Convention COP6 in 2013: · Guidance on the Global Monitoring Plan for Persistent Organic Pollutants UNEP/POPS/COP.6/INF/31 (version January 2013) · Conclusions of the Meeting of the Global Coordination Group and Regional Organization Groups for the Global Monitoring Plan for POPs, held in Geneva, 10–12 October 2012 · Conclusions of the Meeting of the expert group on data handling under the global monitoring plan for persistent organic pollutants, held in Brno, Czech Republic, 13-15 June 2012 The individual reported data component is inserted as: · free text or number (e.g. Site name, Monitoring programme, Value) · a defined item selected from a particular code list (e.g., Country, Chemical – group, Sampling). All code lists (i.e., allowed values for individual parameters) are enclosed in this document, either in a particular section (e.g., Region, Method) or listed separately in the annexes below (Country, Chemical – group, Parameter) for your reference. -
Validation of Reanalysis Southern Ocean Atmosphere Trends Using Sea Ice Data
Atmos. Chem. Phys., 20, 14757–14768, 2020 https://doi.org/10.5194/acp-20-14757-2020 © Author(s) 2020. This work is distributed under the Creative Commons Attribution 4.0 License. Validation of reanalysis Southern Ocean atmosphere trends using sea ice data William R. Hobbs1,3,5, Andrew R. Klekociuk2,3, and Yuhang Pan4 1Institute for Marine and Antarctic Studies (IMAS), University of Tasmania, Hobart, TAS 7001, Australia 2Antarctica and the Global System Program, Australian Antarctic Division, 203 Channel Highway, Kingston, TAS 7050, Australia 3Australian Antarctic Program Partnership, IMAS, University of Tasmania, Hobart, TAS 7001, Australia 4School of Earth Sciences, McCoy Building, The University of Melbourne, Parkville, VIC 3010, Australia 5ARC Centre of Excellence for Climate Extremes, IMAS, University of Tasmania, Hobart, TAS 7001, Australia Correspondence: William R. Hobbs ([email protected]) Received: 11 June 2020 – Discussion started: 29 July 2020 Revised: 5 October 2020 – Accepted: 23 October 2020 – Published: 2 December 2020 Abstract. Reanalysis products are an invaluable tool for rep- ing of West Antarctic ice shelves (Lenaerts et al., 2017; Paolo resenting variability and long-term trends in regions with et al., 2018; Dotto et al., 2019), with implications for global limited in situ data, and especially the Antarctic. A compar- barystatic sea level rise (Dupont and Alley, 2005; Pritchard ison of eight different reanalysis products shows large dif- et al., 2012; Paolo et al., 2015), and polar winds are clearly ferences in sea level pressure and surface air temperature related to observed Antarctic sea ice trends (Holland and trends over the high-latitude Southern Ocean, with implica- Kwok, 2012). -
Multidecadal Warming and Density Loss in the Deep Weddell Sea, Antarctica
15 NOVEMBER 2020 S T R A S S E T A L . 9863 Multidecadal Warming and Density Loss in the Deep Weddell Sea, Antarctica VOLKER H. STRASS,GERD ROHARDT,TORSTEN KANZOW,MARIO HOPPEMA, AND OLAF BOEBEL Alfred-Wegener-Institut Helmholtz-Zentrum fur€ Polar- und Meeresforschung, Bremerhaven, Germany (Manuscript received 16 April 2020, in final form 10 August 2020) ABSTRACT: The World Ocean is estimated to store more than 90% of the excess energy resulting from man-made greenhouse gas–driven radiative forcing as heat. Uncertainties of this estimate are related to undersampling of the subpolar and polar regions and of the depths below 2000 m. Here we present measurements from the Weddell Sea that cover the whole water column down to the sea floor, taken by the same accurate method at locations revisited every few years since 1989. Our results show widespread warming with similar long-term temperature trends below 700-m depth at all sampling sites. The mean heating rate below 2000 m exceeds that of the global ocean by a factor of about 5. Salinity tends to increase—in contrast to other Southern Ocean regions—at most sites and depths below 700 m, but nowhere strongly enough to fully compensate for the warming effect on seawater density, which hence shows a general decrease. In the top 700 m neither temperature nor salinity shows clear trends. A closer look at the vertical distribution of changes along an ap- proximately zonal and a meridional section across the Weddell Gyre reveals that the strongest vertically coherent warming is observed at the flanks of the gyre over the deep continental slopes and at its northern edge where the gyre connects to the Antarctic Circumpolar Current (ACC). -
2019 Weddell Sea Expedition
Initial Environmental Evaluation SA Agulhas II in sea ice. Image: Johan Viljoen 1 Submitted to the Polar Regions Department, Foreign and Commonwealth Office, as part of an application for a permit / approval under the UK Antarctic Act 1994. Submitted by: Mr. Oliver Plunket Director Maritime Archaeology Consultants Switzerland AG c/o: Maritime Archaeology Consultants Switzerland AG Baarerstrasse 8, Zug, 6300, Switzerland Final version submitted: September 2018 IEE Prepared by: Dr. Neil Gilbert Director Constantia Consulting Ltd. Christchurch New Zealand 2 Table of contents Table of contents ________________________________________________________________ 3 List of Figures ___________________________________________________________________ 6 List of Tables ___________________________________________________________________ 8 Non-Technical Summary __________________________________________________________ 9 1. Introduction _________________________________________________________________ 18 2. Environmental Impact Assessment Process ________________________________________ 20 2.1 International Requirements ________________________________________________________ 20 2.2 National Requirements ____________________________________________________________ 21 2.3 Applicable ATCM Measures and Resolutions __________________________________________ 22 2.3.1 Non-governmental activities and general operations in Antarctica _______________________________ 22 2.3.2 Scientific research in Antarctica __________________________________________________________ -
Federal Register/Vol. 84, No. 78/Tuesday, April 23, 2019/Rules
Federal Register / Vol. 84, No. 78 / Tuesday, April 23, 2019 / Rules and Regulations 16791 U.S.C. 3501 et seq., nor does it require Agricultural commodities, Pesticides SUPPLEMENTARY INFORMATION: The any special considerations under and pests, Reporting and recordkeeping Antarctic Conservation Act of 1978, as Executive Order 12898, entitled requirements. amended (‘‘ACA’’) (16 U.S.C. 2401, et ‘‘Federal Actions to Address Dated: April 12, 2019. seq.) implements the Protocol on Environmental Justice in Minority Environmental Protection to the Richard P. Keigwin, Jr., Populations and Low-Income Antarctic Treaty (‘‘the Protocol’’). Populations’’ (59 FR 7629, February 16, Director, Office of Pesticide Programs. Annex V contains provisions for the 1994). Therefore, 40 CFR chapter I is protection of specially designated areas Since tolerances and exemptions that amended as follows: specially managed areas and historic are established on the basis of a petition sites and monuments. Section 2405 of under FFDCA section 408(d), such as PART 180—[AMENDED] title 16 of the ACA directs the Director the tolerance exemption in this action, of the National Science Foundation to ■ do not require the issuance of a 1. The authority citation for part 180 issue such regulations as are necessary proposed rule, the requirements of the continues to read as follows: and appropriate to implement Annex V Regulatory Flexibility Act (5 U.S.C. 601 Authority: 21 U.S.C. 321(q), 346a and 371. to the Protocol. et seq.) do not apply. ■ 2. Add § 180.1365 to subpart D to read The Antarctic Treaty Parties, which This action directly regulates growers, as follows: includes the United States, periodically food processors, food handlers, and food adopt measures to establish, consolidate retailers, not States or tribes. -
Observations on Penguins in the King Haakon VII Sea, Antarctica P.R
S. Afr. J. Antarct. Res., Vol. 9, 1979 29 Observations on penguins in the King Haakon VII Sea, Antarctica P.R. Condy Mammal Research Institute, University of Pretoria, Pretoria 0002 Data 011 penguin density, species composition, group size and and the surface nature of a floe was recorded as being either distribution were collected during the course of a seal census in smooth or hummocked. lee floes which were only partly pack ice in the King Haakon VII Sea, Antarctica, in January hummocked presented difficulties when classifying surface and February 1977. A total of 774 Addie mu/ 39 emperor pen structure, and only that part of the floe which was occupied guins were counted witl1in the 0,4 km wide cens1ts strips. An was classified. Penguins tended to move about a floe if the area of 288,17 km'!. of pack ice was censused and Adr'!lie and ship passed close by, so only the surface nature of that part emperor penguins occurred at densities of 2,69 and 0,14 indi of the floc occupied by them when they were first SCCil was viduals per km2 respecth·dy. Mean group size was 3,72 +3,76 classified. (n~J83) and 1,17±0,38 (n--~29) respecth·ely. Mean pack ice Observations were made from the ship's bridge 10 m above conce1/lration throughout the census was 0,48 ±0,25 tenths the waterline, and the limits of the 200 m census strips on (n~336). Both species were sem in all ice conditions, being either side of the ship were estimated using a sighting board more numerous in open to medium ice concentrations. -
Helicopter Operations of the Argentine Air Force in Antarctica 1968 - 2015
transactions of the institute of aviation ISSN 0509-6669 no. 1(242) , pp. 57-71, Warsaw 2016 eISSN 2300-5408 Doi: 10.5604/05096669.1202202 heLicoPter oPerations of the arGentine air force in antarctica 1968 - 2015 GuIllermo S. P oSadaS argentine air Force abstract This paper is a very brief summary of the operations of the argentine air Force (aaF) helicopters in the argentine antarctic. It is a transcription of a Power Point Presentation of the lecture that was given on June 26, 2015 during the X National Helicopter Forum 2015 held at the Institute of aviation in Poland. Keywords : argentine air Force, helicopter operations, antarctic. 1. introDuction The antarctica is a hostile and deserted territory with extremely low temperatures. Winters are long and in summers sometimes the weather conditions do not allow for air operations to last longer than a few hours per day. However,it is possible to operate helicopters safely,following certain guidelines and having the right equipment which is not always very sophisticated. Helicopter operations in the antarctica are very risky and for that reason their preparation has to be very careful in order to make the as safe as possible. It is essential to have fuel, lubricating oils and fluids suitable for low temperatures as well as well-trained people. 2. Brief DescriPtion of the antarctic continent Fig. 1 the antarctic continent,where the South Pole , is located is in the south hemisphere from parallel 60° South. The antarctic Continent has a surface of 14 millions of km 2. during summer the area free of ice is only 280 000 km 2. -
1 Influence of Sea Ice Anomalies on Antarctic Precipitation Using
https://doi.org/10.5194/tc-2019-69 Preprint. Discussion started: 12 June 2019 c Author(s) 2019. CC BY 4.0 License. Influence of Sea Ice Anomalies on Antarctic Precipitation Using Source Attribution Hailong Wang1*, Jeremy Fyke2,3, Jan Lenaerts4, Jesse Nusbaumer5,6, Hansi Singh1, David Noone7, and Philip Rasch1 (1) Pacific Northwest National Laboratory, Richland, WA 5 (2) Los Alamos National Laboratory, Los Alamos, NM (3) Associated Engineering, Vernon, British Columbia, Canada (4) Department of Atmospheric and Oceanic Sciences, University of Colorado at Boulder, Boulder, CO (5) NASA Goddard Institute for Space Studies, New York, NY (6) Center for Climate Systems Research, Columbia University, New York, NY 10 (7) Oregon State University, Corvallis, OR *Correspondence to: [email protected] 1 https://doi.org/10.5194/tc-2019-69 Preprint. Discussion started: 12 June 2019 c Author(s) 2019. CC BY 4.0 License. Abstract We conduct sensitivity experiments using a climate model that has an explicit water source tagging capability forced by prescribed composites of sea ice concentrations (SIC) and corresponding SSTs to understand the impact of sea ice anomalies on regional evaporation, moisture transport, and source– 5 receptor relationships for precipitation over Antarctica. Surface sensible heat fluxes, evaporation, and column-integrated water vapor are larger over Southern Ocean (SO) areas with lower SIC, but changes in Antarctic precipitation and its source attribution with SICs reflect a strong spatial variability. Among the tagged source regions, the Southern Ocean (south of 50°S) contributes the most (40%) to the Antarctic total precipitation, followed by more northerly ocean basins, most notably the S. -
Intercomparison of Ground- and Satellite-Based Total Ozone Data Products at Marambio Base, Antarctic Peninsula Region
atmosphere Article Intercomparison of Ground- and Satellite-Based Total Ozone Data Products at Marambio Base, Antarctic Peninsula Region Klára Cˇ ížková 1,2,*, Kamil Láska 1 , Ladislav Metelka 2 and Martin Stanˇek 2 1 Department of Geography, Faculty of Science, Masaryk University, 611 37 Brno, Czech Republic; [email protected] 2 Solar and Ozone Observatory, Czech Hydrometeorological Institute, 500 08 Hradec Králové, Czech Republic; [email protected] (L.M.); [email protected] (M.S.) * Correspondence: [email protected] Received: 26 October 2019; Accepted: 15 November 2019; Published: 18 November 2019 Abstract: This study aims to compare the ground-based Brewer spectrophotometer total ozone column measurements with the Dobson spectrophotometer and various satellite overpass data available at Marambio Base during the period 2011–2013. This station provides a unique opportunity to study ozone variability near the edge of the southern polar vortex; therefore, many institutions, such as the National Meteorological Service of Argentina, the Finnish Meteorological Institute and the Czech Hydrometeorological Institute, have been carrying out various scientific activities there. The intercomparison was performed using total ozone column data sets retrieved from the ground-based instruments and from Ozone Monitoring Instrument (OMI)—Total Ozone Mapping Spectrometer (TOMS), OMI–Differential Optical Absorption Spectroscopy (DOAS), Global Ozone Monitoring Experiment 2 (GOME2), and Scanning Imaging Absorption Spectrophotometer for Atmospheric Cartography (SCIAMACHY) satellite observations. To assess the quality of the selected data products, comparisons with reference to the Brewer spectrophotometer single observations were made. The performance of the satellite observational techniques was assessed against the solar zenith angle and effective temperature, as well as against the actual shape of the vertical ozone profiles, which represent an important input parameter for the satellite ozone retrievals.