The Iceland Greenland Seas Project
The Iceland Greenland Seas Project
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冰岛格陵兰海项目
DOI：
10.1175/bams-d-18-0217.1
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发表时间：
2019
影响因子：
8
通讯作者：
Renfrew I
中科院分区：
文献类型：
--
作者：
Renfrew I
冰岛-格陵兰海洋项目（IGP）是一个协调的大气-海洋研究项目，调查大西洋经向翻转环流最密集水域源区的气候过程。2018年2月至3月期间，在冰岛和格陵兰南部海域开展了一次实地考察活动，利用一系列观测平台调查该地区的关键过程，包括一艘研究船、一架研究飞机、系泊、海上滑翔机、浮子和一个气象浮标。实地考察活动的一个显著特点是观测平台的高度协调部署，据此，研究船和飞机轨迹被协调规划，以便同时对大气、海洋及其相互作用进行采样。这种联合规划得到了量身定制的对流天气预报和来自集合预报系统的新诊断的支持。IGP的科学目的是描述耦合过程的大气强迫和海洋响应；特别是在边缘冰带附近的冷空气爆发及其引发的海洋热损失，以及淡水在产生密集水团中的作用。该运动观察了冰岛海上空长期冷空气爆发的生命周期和格陵兰海上空冷空气爆发的发展。反复的剖面分析揭示了对海洋的直接影响，而全面的水文调查提供了冬季这些亚极地海洋的罕见图片。在分析阶段还采用了大气-海洋联合方法，同时正在进行耦合观测分析和协调的数值模拟活动。
The Iceland Greenland Seas Project (IGP) is a coordinated atmosphere–ocean research program investigating climate processes in the source region of the densest waters of the Atlantic meridional overturning circulation. During February and March 2018, a field campaign was executed over the Iceland and southern Greenland Seas that utilized a range of observing platforms to investigate critical processes in the region, including a research vessel, a research aircraft, moorings, sea gliders, floats, and a meteorological buoy. A remarkable feature of the field campaign was the highly coordinated deployment of the observing platforms, whereby the research vessel and aircraft tracks were planned in concert to allow simultaneous sampling of the atmosphere, the ocean, and their interactions. This joint planning was supported by tailor-made convection-permitting weather forecasts and novel diagnostics from an ensemble prediction system. The scientific aims of the IGP are to characterize the atmospheric forcing and the ocean response of coupled processes; in particular, cold-air outbreaks in the vicinity of the marginal ice zone and their triggering of oceanic heat loss, and the role of freshwater in the generation of dense water masses. The campaign observed the life cycle of a long-lasting cold-air outbreak over the Iceland Sea and the development of a cold-air outbreak over the Greenland Sea. Repeated profiling revealed the immediate impact on the ocean, while a comprehensive hydrographic survey provided a rare picture of these subpolar seas in winter. A joint atmosphere–ocean approach is also being used in the analysis phase, with coupled observational analysis and coordinated numerical modeling activities underway.