GLOBEC: Long-Term Observation Program in the Marine Ecosystem of the Northern California Current

全球生物多样性委员会在北方加州海流海洋生态系统的长期观测方案全球生物多样性委员会东北太平洋方案内的长期观测方案的目标是提供一些关键地点的物理、化学和生物环境的基本季节性描述;长期观测方案还旨在提供关于年际变化和长期变化的信息。 北方加州海流区LTOP的具体目标是：季节性采样截至2003年9月的二维温度、盐度、密度、速度、溶解氧、营养盐、叶绿素和浮游动物场（每年五次）;确定布兰科角以北和以南的区域是否具有相似的年际变化;并确定1976 - 1977年大尺度气候的制度转变是否反映在当代气候的显著差异中，（1997 - 2003）和历史（1961 - 1973）对俄勒冈州中部海洋生态系统的观测。春季和夏季的边缘断面，以比较布兰科角北部和南部的上升流状况，并估计40 ° N和45 ° N之间的大尺度沿岸梯度;在落潮季节（晚秋和冬季），沿岸均匀性较高时，只对一个样带进行采样。 在加州海流全球生物多样性过程研究的两年（2000年和2002年）期间，将加强取样，在这两年的春季和夏季航行中增加两个中间跨大陆架部分。 所有管线上的取样将包括正在进行的水柱取样以及现场水柱取样。 在所有春季和夏季巡航中，将在纽波特外的五个地点部署15米水深的WOCE型漂流器。 将在纽波特外维持一个系泊设施，以提供海洋生态系统时间变化的连续记录，可用于更精确地确定春季和秋季过渡的时间、与厄尔尼诺事件有关的异常条件的开始以及沿海海洋对当地风力的反应。

GLOBEC Long-Term Observation Program in the Marine Ecosystem of the Northern California CurrentThe goal of the Long-Term Observation Program (LTOP) within GLOBEC North East Pacific Program is to provide the fundamental seasonal description of the physical, chemical and biological environment at a few critical locations; the LTOP also aims to provide information on interannual variability and long-term changes. The specific objectives of the LTOP in the Northern California Current region are: seasonal sampling (five times per year) of two-dimensional temperature, salinity, density, velocity, dissolved oxygen, nutrient, chlorophyll and zooplankton fields through September 2003; to determine whether the domains north and south of Cape Blanco have similar interannual variability; and to determine whether the 1976 - 1977 regime shift in the large-scale climate is reflected in significant differences between contemporary (1997 - 2003) and historical (1961 - 1973) observations of the marine ecosystem off central Oregon.The PIs will sample three cross-margin transects in spring and summer to compare the upwelling regimes north and south of Cape Blanco and to estimate the large-scale alongshore gradients between 40 degrees N and 45 degrees N; only one transect will be sampled during the downwelling season (late fall and winter) when there is high alongshore homogeneity. Sampling will be enhanced during the two years (2000 and 2002) of GLOBEC Process Studies in the California Current by adding two intermediate cross-shelf sections on spring and summer cruises in those years. Sampling on all lines will include underway sampling as well as on-station sampling of the water column. WOCE-type drifters drogued at 15 m will be deployed at five locations off Newport on all spring and summer cruises. One mooring will be maintained off Newport to provide a continuous record of the temporal variability of the marine ecosystem that can be used to identify more precisely the timing of the spring and fall transitions, the onset of anomalous conditions associated with El Nino episodes, and the coastal ocean response to local wind forcing.