文献类型：期刊文献

英文题名：Timing and magnitude of spring bloom and effects of physical environments over the Grand Banks of Newfoundland

作者：Zhao, Hui[1,2];Han, Guoqi[1];Wang, Dongxiao[3]

机构：[1]Fisheries & Oceans Canada, Northwest Atlantic Fisheries Ctr, St John, NF, Canada;[2]Guangdong Ocean Univ, Coll Ocean & Meteorol, Zhanjiang 524088, Peoples R China;[3]Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou, Guangdong, Peoples R China

年份：2013

卷号：118

期号：4

起止页码：1385

外文期刊名：JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES

收录：SCI-EXPANDED(收录号：WOS:000329871400004)、、Scopus(收录号：2-s2.0-84892903557)、WOS

基金：This study was supported by the Canadian Space Agency Government Related Initiatives Program (GRIP) and the Key Project of DEGP, China (No. 2012KJCX0065). The GlobColour project has been initiated and funded by the ESA Data User Element Programme to develop a satellite-based ocean colour data service to support global carbon cycle research. The GlobColour products have undergone an extensive validation based on a validation protocol derived from the SIMBIOS protocol. The GlobColour products have been derived with the GSM model and algorithm, developed by ICESS [Maritorena and Siegel, 2005].

语种：英文

外文关键词：spring blooms; light; nutrients; Grand Banks of Newfoundland; sea surface temperature; Labrador Current

外文摘要：Spring bloom is a dominant feature of seasonal phytoplankton cycles in the northwest Atlantic continental shelf. In this study, we investigate temporal and spatial variations of spring-bloom timing and intensity over the Grand Banks of Newfoundland, using satellite ocean color data and other oceanographic measurements from January 1998 to December 2009. The spring bloom has strong interannual and meridional changes in its timing and intensities. Physical oceanographic conditions including the sea surface temperature (SST), wind speed, and mixed layer depth (MLD) also show evident interannual variations. The spring boom starts first in the southern Bank in February-March and often in the central and northern Bank in April, respectively. An early initiation of spring blooms is generally associated with high SST, weak winds, and shallow MLD at the beginning stage of the spring blooms, and tends to result in stronger intensities. However, the photosynthesis available radiance does not seem to affect the bloom initiation in the southern area or the bloom intensity over the entire Banks. In the southern area, higher SST does not lead to larger bloom magnitude. Our analysis shows that the effect of the SST in the northern area is primarily through the earlier ice melting. It also indicates that Sverdrup's critical depth criteria are suitable for conditions over the Grand Banks. The present study points to the significant sub-bank-scale differences in the timing and magnitude of the spring bloom attributable to underlying physical environments, important for the integrated management of the Grand Banks ecosystem.