Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017GL076591 |
Coastal Freshening Prevents Fjord Bottom Water Renewal in Northeast Greenland: A Mooring Study From 2003 to 2015 | |
Boone, Wieter1; Rysgaard, Soren1,2,3; Carlson, Daniel F.2,4; Meire, Lorenz5; Kirillov, Sergei1; Mortensen, John3; Dmitrenko, Igor1; Vergeynst, Leendert2; Sejr, Mikael K.2,6 | |
2018-03-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2018 |
卷号 | 45期号:6页码:2726-2733 |
文章类型 | Article |
语种 | 英语 |
国家 | Canada; Denmark; Greenland; USA; Netherlands |
英文摘要 | The freshwater content of the Arctic Ocean and its bordering seas has recently increased. Observing freshening events is an important step toward identifying the drivers and understanding the effects of freshening on ocean circulation and marine ecosystems. Here we present a 13 year (2003-2015) record of temperature and salinity in Young Sound-Tyrolerfjord (74 degrees N) in Northeast Greenland. Our observations show that strong freshening occurred from August 2005 to August 2007 (-0.92 psu or -0.46 psu yr(-1)) and from August 2009 to August 2013 (-0.66 psu or -0.17 psu yr(-1)). Furthermore, temperature-salinity analysis from 2004 to 2014 shows that freshening of the coastal water (similar to range at sill depth: 33.3 psu in 2005 to 31.4 psu in 2007) prevented renewal of the fjord's bottom water. These data provide critical observations of interannual freshening rates in a remote fjord in Greenland and in the adjacent coastal waters and show that coastal freshening impacts the fjord hydrography, which may impact the ecosystem dynamics in the long term. Plain Language Summary The freshwater content of the Arctic Ocean has increased in recent years in response to climate change, but the impact of freshening on coastal ecosystems, such as fjords, is largely unknown. Freshening is important, as the related change in density can weaken vertical mixing and, subsequently, slow or stop the renewal of the fjord bottom water. Analysis of long-term data (2003-2015) near Young Sound-Tyrolerfjord, a high Arctic fjord in Northeast Greenland, identified anomalously strong freshening events that are at the high end in comparison to other freshening estimates from around the Arctic. Furthermore, the data reveals that renewal of the bottom water was prevented by freshening of the coastal water since 2004-2005. This shift toward fresher coastal water, in combination with freshening of the fjord's basin water, may impact the fjord's ecosystem functioning in the long term. The observations in this study provide new insights into the temporal variability of salinity and temperature and thus provide a critical step toward an impact assessment and identification of underlying processes driving freshening in Northeast Greenland. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000430106000020 |
WOS关键词 | FRAM STRAIT ; OVERTURNING CIRCULATION ; ICE-SHEET ; VARIABILITY ; DYNAMICS ; IMPACTS ; 74-DEGREES-N ; EXCHANGE ; GLACIER ; SHELF |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/27645 |
专题 | 气候变化 |
作者单位 | 1.Univ Manitoba, Ctr Earth Observat Sci, Winnipeg, MB, Canada; 2.Aarhus Univ, Arctic Res Ctr, Aarhus, Denmark; 3.Greenland Inst Nat Resources, Greenland Climate Res Ctr, Nuuk, Greenland; 4.Florida State Univ, Dept Earth Ocean & Atmospher Sci, Tallahassee, FL 32306 USA; 5.Univ Utrecht, NIOZ Royal Netherlands Inst Sea Res, Dept Estuarine & Delta Syst, Yerseke, Netherlands; 6.Aarhus Univ, Dept Biosci, Aarhus, Denmark |
推荐引用方式 GB/T 7714 | Boone, Wieter,Rysgaard, Soren,Carlson, Daniel F.,et al. Coastal Freshening Prevents Fjord Bottom Water Renewal in Northeast Greenland: A Mooring Study From 2003 to 2015[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(6):2726-2733. |
APA | Boone, Wieter.,Rysgaard, Soren.,Carlson, Daniel F..,Meire, Lorenz.,Kirillov, Sergei.,...&Sejr, Mikael K..(2018).Coastal Freshening Prevents Fjord Bottom Water Renewal in Northeast Greenland: A Mooring Study From 2003 to 2015.GEOPHYSICAL RESEARCH LETTERS,45(6),2726-2733. |
MLA | Boone, Wieter,et al."Coastal Freshening Prevents Fjord Bottom Water Renewal in Northeast Greenland: A Mooring Study From 2003 to 2015".GEOPHYSICAL RESEARCH LETTERS 45.6(2018):2726-2733. |
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