Fifty four years of coastal erosion and hydrometeorological parameters in the Varandey region, Barents Sea
Fifty four years of coastal erosion and hydrometeorological parameters in the Varandey region, Barents Sea
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巴伦支海 Varandey 地区五十四年的海岸侵蚀和水文气象参数
DOI：
10.1016/j.coastaleng.2019.103610
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发表时间：
2020
影响因子：
4.4
通讯作者：
S. Ogorodov
中科院分区：
文献类型：
--
作者：
A. Sinitsyn;E. Guégan;Natalia Shabanova;O. Kokin;S. Ogorodov
巴伦支海东南海岸线Varandey定居点地区的特点是温暖的永久冻土。自1980年代初以来进行的海岸研究表明，1969年至1987年，该地区不同地点的海岸后退，平均侵蚀率高达2 - 5米/年。本研究总结了该地区环境强迫的长期（1951 - 2013）观测，以及基于最近的实地调查（2011 - 2013）和遥感研究（1961 - 2012）的退缩率估计。这些数据对于研究区域的任何基础设施发展至关重要。海岸线被分为三个有条件的地理部分：佩夏科夫，Varandey，和Medynskiy。结果表明，在过去54年中，佩夏科夫区侵蚀部分的平均侵蚀速率为2m/a，瓦兰代区西部为1.8m/a，整个梅德恩斯基区为2.3m/a。遥感观测记录了2004 - 2012年期间Novyy Varandey定居点沿海地区许多建筑物的破坏情况。在2010年夏季的风暴潮之后，2010年至2011年期间，在Medynsky的15公里长的海岸线上观察到了19.6米/年的惊人的海岸悬崖衰退。1979 - 2013年在Varandey地区观测到环境强迫（气温、波能因子、有效波高和海平面）的波动。环境强迫的长期演变呈现出增强的趋势。从1961年到2013年，Medynsky扇区的平均长期侵蚀速率增加（0.6 - 4.8 m/年），这是1979 - 2013年环境强迫演变的结果。不同的海岸侵蚀响应和过程从一个稳定的情况下，主动侵蚀由于机械波的作用，热磨损，热剥蚀，或这些过程的组合被确定在theVarandey地区。
The southeast coastline of the Barents Sea in the area of theVarandeysettlement is characterized by warm permafrost. Coastal studies conducted since the early 1980s have shown coastal retreat with average erosion rates of up to 2–5 m/yr from 1969 to 1987 at different locations in the area. The present study summarizes long-term (1951–2013) observations of environmental forcing in the area, and estimations of retreat rates based on recent fieldwork (2011–2013) and remote sensing studies (1961–2012). Such data is of primary importance for any infrastructure developments in the study area. The coastline was divided into three conditional geographical sectors:Pesyakov,Varandey, andMedynskiy. It was found that the average erosion rate in eroding parts ofPesyakovsector was 2 m/yr, in the western part ofVarandeysector—1.8 m/yr, and in the entireMedynskiysector—2.3 m/yr over the last 54 years. Remote sensing observations documented the destruction of numerous buildings in the coastal zone of theNovyy Varandeysettlement in 2004–2012. A striking coastal bluff recession of 19.6 m/yr over the 15-km-long coastline inMedynskiywas observed between 2010 and 2011, following a storm surge in the area in the summer of 2010. Fluctuations of environmental forcing (air temperatures, wave energy factor, significant wave height, and sea level) were observed in theVarandeyarea in 1979–2013. The long-term evolution of environmental forcing exhibits an increasing trend. The increase (0.6–4.8 m/yr) of average long-term erosion rates in theMedynskiysector from 1961 to 2013 followed the evolution of environmental forcing in 1979–2013. Different coastal erosion responses and processes varying from a stable situation to active erosion due to mechanical wave action, thermal abrasion, thermal denudation, or a combination of these processes were identified in theVarandeyarea.