SBC LTER: CTD profiles from UNOLS cruises in the Santa Barbara Channel: LTER04, 2002-04-24 to 2002-05-03

The data described here were collected on LTER04 which took place from 2002-04-24 to 2002-05-03 on the RV Pt. Sur. Cruises have been conducted in the Santa Barbara Channel, California, USA, 3-4 times per year since March, 2001 and are approximately 7 days in length. There are 4 basic types of measurements: Profiles at 25 grid stations unique to the SBCLTER and 7 cross-channel stations (also occupied by the Plumes and Blooms project). Measurements include primary production, basic CTD parameters (Seabird 911-plus), inorganic nutrients, phytoplankton pigments, particulate organic carbon and nitrogen, natural abundances of N and C isotopes, and occasionally biogenic and lithogenic silica, optics, and/or dissolved organic carbon. Two-dimensional sections of oceanic constituents are recorded in the top 120m with an undulating towed CTD scanning system (Scanfish) on both along shore and cross-channel transects. Underway measurements: fluorometry, salinity and temperature are collected at a depth of 3m with a flow-through system which also includes continuous climate measurements. Underway acoustic dopler current profiles were collected using a RDInstruments Workhorse 300kHz ADCP. On Cruise LTER04, additional CTD and Rosette samples were collected to document areas off Naples, Arroyo Quemado and Bullito. On this cruise, additional stations and are identified as MO*, KO* and RO*本次描述的数据集采集自LTER04航次，该航次于2002年4月24日至2002年5月3日期间在瑟斯角号研究船（RV Pt. Sur）上开展。自2001年3月起，每年在美国加利福尼亚州圣巴巴拉海峡开展3-4次航次，单次航次时长约7天。 本数据集包含4类基础观测项目：圣巴巴拉海峡长期生态研究站（SBCLTER）专属的25个网格站位剖面观测，以及7个跨海峡站位（该站位同时由“羽流与水华”项目（Plumes and Blooms project）布设监测）。观测内容涵盖初级生产力、基础温盐深（CTD）参数（由Seabird 911-plus型设备采集）、无机营养盐、浮游植物色素、颗粒有机碳与氮、氮和碳同位素自然丰度，偶测生物成因硅与陆源成因硅、水体光学特性，以及溶解有机碳。 沿岸线及跨海峡断面方向，采用起伏式拖曳温盐深扫描系统（Scanfish）在表层120米水体中采集海洋组分的二维断面数据。 走航观测：采用流通式系统在3米水深采集荧光强度、盐度与温度数据，该系统可同步开展连续气候观测；同时采用RD仪器公司（RDInstruments）Workhorse 300kHz型号声学多普勒流速剖面仪（ADCP）采集走航声学多普勒流速剖面数据。 在本次LTER04航次中，额外布设了温盐深及罗塞特采水器（Rosette sampler）采样，以对那不勒斯（Naples）、Arroyo Quemado与Bullito外海域进行观测记录。本次航次增设的站位编号为MO*、KO*及RO*。