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Woods Hole Oceanographic Institution

Ke Chen

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Publications
»Diagnosing the warming of the Northeastern U.S. Coastal Ocean in 2012: A linkage between the atmospheric jet stream variability and ocean response
»Data assimilative modeling investigation of Gulf Stream Warm Core Ring interaction with continental shelf and slope circulation
»Seasonal and Interannual Variability of Physical and Biological Dynamics at the Shelfbreak Front of the Middle Atlantic Bight: Nutrient Supply Mechanisms
»Mesoscale Variations of Sea Surface Temperature and Ocean Color Patterns at the Mid-Atlantic Bight Shelfbreak
»Numerical Investigation of the Middle Atlantic Bight Frontal Circulation using a High Resolution Ocean Hindcast Model
»Mean circulation in the coastal ocean off Northeastern North America from a regional-scale ocean model
»The role of atmospheric forcing versus ocean advection during the extreme warming on the Northeast U.S. shelf in 2012


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Chen K., G. G. Gawarkiewicz, S. J. Lentz, J. M. Bane, Diagnosing the warming of the Northeastern U.S. Coastal Ocean in 2012: A linkage between the atmospheric jet stream variability and ocean response, Journal Of Geophysical Research, VOL. 119, doi:10.1002/2013JC009393, 2014

The temperature in the coastal ocean off the northeastern U.S. during the first half of 2012 was anomalously warm, and this resulted in major impacts on the marine ecosystem and commercial fisheries. Understanding the spatiotemporal characteristics of the warming and its underlying dynamical processes is important for improving ecosystem management. Here, we show that the warming in the first half of 2012 was systematic from the Gulf of Maine to Cape Hatteras. Moreover, the warm anomalies extended through the water column, and the local temperature change of shelf water in the Middle Atlantic Bight was largely balanced by the atmospheric heat flux. The anomalous atmospheric jet stream position induced smaller heat loss from the ocean and caused a much slower cooling rate in late autumn and early winter of 2011–2012. Strong jet stream intraseasonal oscillations in the first half of 2012 systematically increased the warm anomalies over the continental shelf. Despite the importance of advection in prior northeastern U.S. continental shelf interannual temperature anomalies, our analyses show that much of the 2012 warming event was attributed to local warming from the atmosphere.

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