Local Drivers of Marine Heatwaves: A Global Analysis With an Earth System Model
Local Drivers of Marine Heatwaves: A Global Analysis With an Earth System Model
复制标题
海洋热浪的局部驱动因素：利用地球系统模型进行全球分析
DOI：
10.3389/fclim.2022.847995
复制
发表时间：
2022
影响因子：
2.5
通讯作者：
T. Frölicher
中科院分区：
文献类型：
--
作者：
Linus Vogt;F. A. Burger;S. Griffies;T. Frölicher
海洋热浪是极端温暖的海洋温度，可能对海洋生物和社会经济系统产生破坏性影响。尽管最近在了解个别事件的基本过程方面取得了进展，但目前缺乏对MHWs的当地海洋和大气驱动因素的全球观点。在这里，我们使用每日平均输出的温度趋势项从一个全面的完全耦合的粗分辨率地球系统模型，以量化的主要本地过程，导致在不同的季节发病和下降的表面MHWs。在亚热带和中高纬地区的MHWs的发生主要是由净海洋热量吸收与减少潜热损失在所有季节，增加短波热吸收，减少显热损失在冬季，减少垂直混合的K剖面参数化边界层方案（KPP）的非本地部分，特别是在夏季。在热带，海洋热吸收减少，垂直局部混合和扩散导致变暖。在随后的下降阶段，由于所有季节潜热损失的增加，加上夏季高纬度地区垂直局部混合和扩散的加强，海洋向大气的热损失增加，这是全球温度下降的主要原因。导致MHWs的开始和下降的过程对于短和长MHWs是相似的，但是在夏季和冬季之间的驱动因素是不同的。不同类型的MHW与不同的驱动程序组合内的事件之间的大的变化被确定。我们的分析有助于更好地了解MHW驱动程序和过程，因此可能有助于改善对高影响海洋热浪的预测。
Marine heatwaves (MHWs) are periods of extreme warm ocean temperatures that can have devastating impacts on marine organisms and socio-economic systems. Despite recent advances in understanding the underlying processes of individual events, a global view of the local oceanic and atmospheric drivers of MHWs is currently missing. Here, we use daily-mean output of temperature tendency terms from a comprehensive fully coupled coarse-resolution Earth system model to quantify the main local processes leading to the onset and decline of surface MHWs in different seasons. The onset of MHWs in the subtropics and mid-to-high latitudes is primarily driven by net ocean heat uptake associated with a reduction of latent heat loss in all seasons, increased shortwave heat absorption in summer and reduced sensible heat loss in winter, dampened by reduced vertical mixing from the non-local portion of the K-Profile Parameterization boundary layer scheme (KPP) especially in summer. In the tropics, ocean heat uptake is reduced and lowered vertical local mixing and diffusion cause the warming. In the subsequent decline phase, increased ocean heat loss to the atmosphere due to enhanced latent heat loss in all seasons together with enhanced vertical local mixing and diffusion in the high latitudes during summer dominate the temperature decrease globally. The processes leading to the onset and decline of MHWs are similar for short and long MHWs, but there are differences in the drivers between summer and winter. Different types of MHWs with distinct driver combinations are identified within the large variability among events. Our analysis contributes to a better understanding of MHW drivers and processes and may therefore help to improve the prediction of high-impact marine heatwaves.
影响因子：
30.7
作者：
Guo X;Gao Y;Zhang S;Wu L;Chang P;Cai W;Zscheischler J;Leung LR;Small J;Danabasoglu G;Thompson L;Gao H
通讯作者：
Gao H
影响因子：
16.6
作者：
Oliver ECJ;Donat MG;Burrows MT;Moore PJ;Smale DA;Alexander LV;Benthuysen JA;Feng M;Sen Gupta A;Hobday AJ;Holbrook NJ;Perkins-Kirkpatrick SE;Scannell HA;Straub SC;Wernberg T
通讯作者：
Wernberg T
影响因子：
30.7
作者：
Smale, Dan A.;Wernberg, Thomas;Moore, Pippa J.
通讯作者：
Moore, Pippa J.