What determines the spatial pattern in summer upwelling trends on the U.S. West Coast?
Brink, Kenneth H.
Dorman, Clive E.
Edwards, Christopher A.
MetadataShow full item record
Analysis of sea surface temperature (SST) from coastal buoys suggests that the summertime over-shelf water temperature off the U.S. West Coast has been declining during the past 30 years at an average rate of −0.19°C decade−1. This cooling trend manifests itself more strongly off south-central California than off Oregon and northern California. The variability and trend in the upwelling north of off San Francisco are positively correlated with those of the equatorward wind, indicating a role of offshore Ekman transport in the north. In contrast, Ekman pumping associated with wind stress curls better explains the stronger and statistically more significant cooling trend in the south. While the coast-wide variability and trend in SST are strongly correlated with those of large-scale modes of climate variability, they in general fail to explain the southward intensification of the trend in SST and wind stress curl. This result suggests that the local wind stress curl, often topographically forced, may have played a role in the upwelling trend pattern.
Author Posting. © American Geophysical Union, 2012. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research 117 (2012): C08012, doi:10.1029/2012JC008016.
Showing items related by title, author, creator and subject.
Intentional versus unintentional nitrogen use in the United States : trends, efficiency and implications Houlton, Benjamin Z.; Boyer, Elizabeth; Finzi, Adrien C.; Galloway, James; Leach, Allison; Liptzin, Daniel; Melillo, Jerry M.; Rosenstock, Todd S.; Sobota, Daniel J.; Townsend, Alan R. (Springer, 2012-10-13)Human actions have both intentionally and unintentionally altered the global economy of nitrogen (N), with both positive and negative consequences for human health and welfare, the environment and climate change. Here we ...
The El Niño – La Niña cycle and recent trends in supply and demand of net primary productivity in African drylands Abdi, Abdulhakim; Vrieling, Anton; Yengoh, Genesis T.; Anyamba, Assaf; Seaquist, Jonathan; Ummenhofer, Caroline C.; Ardö, Jonas (2016-07)Inter-annual climatic variability over a large portion of sub-Saharan Africa is under the influence of the El Niño-Southern Oscillation (ENSO). Extreme variability in climate is a threat to rural livelihoods in sub-Saharan ...
Thomson, James M.; Fan, Yalin; Stammerjohn, Sharon E.; Stopa, Justin; Rogers, W. Erick; Girard-Ardhuin, Fanny; Ardhuin, Fabrice; Shen, Hayley; Perrie, Will; Shen, Hui; Ackley, Steve; Babanin, Alexander; Liu, Qingxiang; Guest, Peter; Maksym, Ted; Wadhams, Peter; Fairall, Christopher W.; Persson, Ola; Doble, Martin; Graber, Hans C.; Lund, Bjoern; Squire, Vernon; Gemmrich, Johannes; Lehner, Susanne; Holt, Benjamin; Meylan, Michael; Brozena, John; Bidlot, Jean-Raymond (Elsevier, 2016-07-06)The sea state of the Beaufort and Chukchi seas is controlled by the wind forcing and the amount of ice-free water available to generate surface waves. Clear trends in the annual duration of the open water season and in the ...