Hydrographic data from the Hawaii Ocean Time-series (HOT) program in the North Pacific, 100 miles north of Oahu, Hawaii for cruises HOT 101-121 during 1999-2000 (NODC Accession 0000639)

The HOT program makes repeated observations of the physics, biology and chemistry at a site approximately 100 km north of Oahu, Hawaii. Two stations are visited about once a month: Kahe Point (Station 1: 21.34N, 158.27W) and Station ALOHA (Station 2: 22.75N, 158W). Various other stations are made intermittently in support of similar research objectives or mooring deployments. Samples of water column chemical analyses were collected mostly in the upper 1000m using Niskin bottles mounted on a rosette. The strategy was to sample at density horizons within the main thermocline at pressure horizons above and below this region (i.e., <150 dbar and >2000 dbar). Care was applied to ensure the highest possible accuracy and precision.HOT项目会对夏威夷瓦胡岛以北约100公里处的站位开展长期重复观测，观测覆盖物理学、生物学与化学相关指标。该项目每月对两个固定站位开展约一次的巡测：卡赫角站（1号站：21.34°N，158.27°W）与ALOHA站（2号站：22.75°N，158°W）。此外还会间歇性布设其他站位，以支撑同类研究目标或锚系设备部署工作。水体化学分析样本主要通过安装于采水罗架（rosette）上的尼斯金采水器（Niskin bottle）采集，采样范围主要集中在1000米以浅的上层海域。本次采样遵循以下策略：在主温跃层内的密度层位，以及该区域上下的压力层位（即<150分巴（dbar）与>2000分巴（dbar））开展采样。实验全程严格把控操作细节，以确保观测结果具备最高的准确度与精密度。