Weather conditions and seasonal variability of limited surface visibility at Greenland coastal locations
Weather conditions and seasonal variability of limited surface visibility at Greenland coastal locations
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格陵兰沿海地区表面能见度有限的天气条件和季节变化
DOI：
10.1002/joc.8332
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发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Hopson, Leah N.
中科院分区：
文献类型：
--
作者：
Laird, Neil F.;Crossett, Caitlin C.;Keaton, Gabrielle A.;Hopson, Leah N.
恶劣天气在高纬度地区的空间和时间上都是可变的。目前的研究对1979年至2018年格陵兰沿海五个地点的有限表面能见度时间段进行了独特的调查，并确定了在有限表面能见度时间段内同时发生的不利天气以及当地和大规模大气条件。格陵兰岛东海岸的地点每月能见度有限的时间百分比最高，2月最高。西部和南部沿海地区能见度有限的情况较少。暖季最大值出现在北方地区，而暖季最小值出现在所有其他地区。所有五个观测站每个月都报告有雾，然而，在格陵兰岛典型的融化季节，北方和东部观测站的小时数大幅增加。与降水相关的能见度小时数百分比存在季节差异，暖季最小，冷季最大。除北方和东部地区在融化季节外，由于降水造成的能见度有限的时间通常占每月时间的最大百分比。横跨加拿大东北部和北大西洋的气旋环流的位置和数量，以及槽的空间规模，极大地影响了与长期有限的表面能见度事件有关的不利天气。在格陵兰图勒，在温暖和寒冷的季节有限的能见度事件在很大程度上受到加拿大东北部气旋的存在和强度的影响。在丹麦港，格陵兰两个季节的能见度有限事件通常有一个位于东部的气旋，格陵兰上空的高压区和一个位于格陵兰西部的气旋。
Adverse weather has been shown to be spatially and temporally variable across high‐latitude locations. The current study provides a unique investigation of limited surface visibility time periods at five coastal Greenland locations from 1979 to 2018 and identifies the coincident adverse weather, as well as the local and large‐scale atmospheric conditions during limited surface visibility time periods. Locations on the east coast of Greenland have the largest percentage of hours with limited visibility each month with maxima during February. Western and southern coastal locations have fewer occurrences of limited visibility. Warm‐season maxima are present in the northern locations, while warm‐season minima occur at all other locations. Fog is reported during each month at all five stations, however, a substantial increase of hours occurs at the northern and eastern stations during the typical melt season on Greenland. There is a seasonal difference in the percent of limited visibility hours linked to precipitation with a minimum in the warm season and maximum across the cold season. Limited visibility attributed to precipitation generally has the largest percentage of hours each month except for the northern and eastern locations during the melt season. The location and number of cyclonic circulations, as well as the spatial scale of troughs, across northeastern Canada and the North Atlantic Ocean greatly influence the adverse weather linked to prolonged limited surface visibility events. Limited visibility events at Thule, Greenland during both the warm and cold seasons are largely influenced by the presence and intensity of a cyclone over northeastern Canada. At Danmarkshavn, Greenland limited visibility events in both seasons generally have a cyclone positioned to the east, an area of higher pressure over Greenland and a cyclone positioned to the west of Greenland.
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影响因子：
2.6
作者：
H. Jiskoot;Theo Harvey;Tyrell R. Nielsen
通讯作者：
H. Jiskoot;Theo Harvey;Tyrell R. Nielsen
根据 ICECAPS 五年观测推断的格陵兰中部降水情况
影响因子：
6.3
作者：
C. Pettersen;R. Bennartz;A. Merrelli;M. Shupe;D. Turner;V. Walden
通讯作者：
V. Walden
雾霾危害
DOI：
--
发表时间：
1990
期刊：
影响因子：
--
作者：
L. Symons;A. Perry
通讯作者：
A. Perry
加拿大北极群岛的气候区
DOI：
--
发表时间：
2007
期刊：
影响因子：
--
作者：
’. J.B.MAXWELL
通讯作者：
’. J.B.MAXWELL
北极环境对军事机动性的影响
DOI：
--
发表时间：
1963
期刊：
影响因子：
--
作者：
R. W. Gerdel
通讯作者：
R. W. Gerdel