Heat Content of the Summer Mixed Layer and its Impact on the Surface Heat Budget in the Arctic

该项目将利用美国海军的一艘潜艇，对影响北冰洋海冰融化的太阳热流进行比以往更大规模的研究。这项研究扩展了研究人员早先的研究，这些研究表明，单一测量地点的热通量存在很大的季节差异。这些研究没有提供将单点测量扩大到大范围区域的机会；因此，北冰洋的大范围和季节性变化模式是未知的。这种可变性很重要，因为气候的汇编模拟必须代表大范围(北极盆地)的热流值，如果单点测量不能代表区域值，可能会出现严重错误。潜艇将提供机会，将点测量扩展到更大的区域，并评估比目前可能的热通量测量中更多的变量。这项研究是一个更大的项目--北冰洋地表热量平衡(SHEBA)的一个组成部分，该项目正在研究全球变化对北冰洋海冰覆盖的作用。使用潜水器将SHEBA现场测量扩展到北冰洋的大片区域，这将使现场测量能够在区域范围内进行校准，并为在整个年度周期内对SHEBA测量进行区域尺度的解释提供了基础。该项目将改进区域和全球环流模型，用于预测全球气候变化对北冰洋冰盖持久性的影响。

ABSTRACT OPP-9728825 OPP-978837 MAYKUT, GARY McPHEE, MILES UNIVERSITY OF WASHINGTON McPHEE RESEARCH The project will utilize a U.S. Navy submarine to conduct a larger-scale study of the solar heat flux affecting the melting of sea ice in the Arctic Ocean than has been possible previously. This study extends earlier studies by the investigators that show large seasonal differences in heat flux at single measurement locations. Those studies did not provide the opportunity to extend the single-point measurements over a large region; therefore, large-scale and seasonal patterns of variability in the Arctic Ocean are unknown. The variability is important because compiler simulations of the climate must represent a large-scale (Arctic Basin) value of heat flux and may be seriously in error if the single-point measurements are not representative of the regional value. The submarine will provide the opportunity to extend the point measurements over a larger region and assess more variables in the heat flux measurement than currently possible. The study is one component of a larger project, Surface HEat Budget of the Arctic Ocean (SHEBA), that is examining the role of global change on the Arctic Ocean sea ice cover. The extension of the SHEBA site measurements to a large region of the Arctic Ocean using the submersible will allow calibration of the site measurements to the regional scale, and provide a basis for a regional-scale interpretation of SHEBA measurements on a full annual cycle. This project will lead to improved regional and global circulation models that are used to predict the impact of global climate change on the permanence of the Arctic Ocean ice pack.