HOT-215 to HOT-307 LISST Profiles

These Simons Collaboration on Ocean Processes and Ecology (SCOPE) data products were produced by the University of Hawaiʻi at Mānoa with support from the Simons Foundation. This dataset was collected on various HOT cruises aboard various research vessels to Station ALOHA north of Oahu, Hawaii. All LISST data were collected with a LISST-100X Type-B instrument operated in profiling mode. The angular range (median of bin) of the LISST Type-B is 0.106-17.96 degrees, and the size classes sensed are 1.44 - 231 microns (median of each size bin), albeit only particles less than 100 µm are considered here. All data have been corrected for background scattering of a clean filtered water calibration. The summed volume concentration of particles (in µL/L), the standard LISST output, is presented for 3 size ranges: 1.25-2 µm, 2-20 µm, and 20-100 µm. Particle volume concentration is then converted to particle concentration (#/L) by assuming spherical particles for particles with a diameter between 1.25 and 100 µm. Larger size classes are excluded due to low detection limits. Note that data have not been processed to remove outliers. The data have been binned to depth at 2m increments, and the latitude/longitude is generalized to Station ALOHA and may not match the ship's position exactly, even though all profiles were conducted inside the ALOHA circle (6 nm radius around the nominal position of 22.75, -158). The timestamp is in UTC.西蒙斯海洋过程与生态合作研究计划（Simons Collaboration on Ocean Processes and Ecology, SCOPE）的数据产品由夏威夷大学马诺阿分校制作，得到西蒙斯基金会（Simons Foundation）资助。 本数据集采集自多次夏威夷长期海洋观测站（Hawaii Ocean Time-series, HOT）航次，搭载各类研究船前往夏威夷瓦胡岛以北的阿洛哈站（Station ALOHA）开展作业。所有LISST数据均采用LISST-100X Type-B型仪器以剖面测量模式采集。该LISST Type-B仪器的测量角度范围（各粒径箱的中值）为0.106~17.96度，可探测的粒径区间为1.44~231微米（各粒径箱的中值），但本次数据集仅考虑粒径小于100微米的颗粒。所有数据均已针对清洁过滤水校准的背景散射效应完成校正。标准LISST输出的颗粒总体积浓度（单位：µL/L）被划分为3个粒径范围予以呈现：1.25~2微米、2~20微米以及20~100微米。随后，针对粒径介于1.25~100微米的颗粒，我们假设其为球形，将体积浓度转换为颗粒数浓度（单位：#/L）。由于检测限偏低，更大的粒径档未被纳入本次数据集。请注意，本数据未经过异常值剔除处理。数据已按2米间隔进行深度分箱，经概化后的经纬度统一对应阿洛哈站；尽管所有剖面测量均在阿洛哈环（以标称位置22.75, -158为中心、半径6海里的区域）内开展，但概化后的坐标可能与船舶实际位置存在细微偏差。时间戳采用协调世界时（UTC）。