中沙群岛及邻近海域0-150米水体理化环境要素、表层沉积物理化环境要素数据集（2019-2021年）

"2019-2021年中沙群岛礁盘以外的开阔水域中海水、沉积物的相关环境化学要素调查数据，描述了各要素之分布特征及其时空变化。数据包括：航次、日期、站位、经度、纬度、水深、采样层位、实际采样深度、水体理化环境要素【透明度、温度、盐度、pH、总碱度、叶绿素a、营养盐（亚硝酸盐氮、硝酸盐氮、氨氮、磷酸盐磷、硅酸盐硅）、溶解氧、六氟化硫、氟氯烃-12、溶解无机碳、溶解有机碳、颗粒有机碳、颗粒有机氮、持久性有机污染物（苊、苊烯 、菲、蒽、荧蒽、芴、萘、1-甲基萘、2-甲基萘、1-甲基菲、2,6-甲基萘、联苯、苯并[j]荧蒽、苯并[b]荧蒽、苯并[k]荧蒽、苯并[a]蒽、䓛、二苯[a,h]并蒽、苉、芘、茚并[1,2,3-cd]芘、苯并[g,h,i]苝、苯并[a]芘、苯并[e]芘、苝、霍烷、2,3,5-三甲基萘、二苯并噻吩、惹烯、4,4'-DDD、4,4'-DDT、4,4'-DDE、艾式剂、beta-硫丹、α-六六六、β-六六六、γ-六六六、δ-六六六、狄氏剂、异狄氏醛、异狄氏剂、七氯、反式环氧七氯、甲氧氯、PCB209、PCB18、PCB28、PCB44、PCB52、PCB70、PCB49、PCB82、PCB101、PCB105、PCB114、PCB128、PCB138、PCB151、PCB153、PCB156、PCB170、PCB171、PCB177、PCB180、PCB183、PCB187、PCB191、PCB194、PCB195、ΣPOPs）、微塑料（总检测颗粒数、微塑料确定比率、换算后丰度、按形状分类、按颜色分类、按颜色分类占比、按成分分类、按成分分类占比）】、沉积物理化环境要素【总有机碳、硫化物、粒径（砾石、砂、粉砂、粘土、沉积物类型）、含水率、灼烧损失率、重金属（铬、镍、铜、锌、砷、硒、镉、铅、汞）、微塑料（总检测颗粒数、微塑料确定比率、换算后丰度、按形状分类、按颜色分类、按颜色分类占比、按成分分类、按成分分类占比）】"

This dataset comprises environmental chemical survey data of seawater and sediments collected from the open waters beyond the reefs of the Zhongsha Islands during 2019–2021, which characterizes the distribution patterns and spatiotemporal variations of multiple environmental parameters. The dataset includes the following information: voyage number, survey date, station location, longitude, latitude, water depth, sampling horizon, actual sampling depth, seawater physicochemical environmental parameters [transparency, temperature, salinity, pH, total alkalinity, chlorophyll a, nutrients (nitrite nitrogen, nitrate nitrogen, ammonia nitrogen, phosphate phosphorus, silicate silicon), dissolved oxygen, sulfur hexafluoride, chlorofluorocarbon-12, dissolved inorganic carbon, dissolved organic carbon, particulate organic carbon, particulate organic nitrogen, persistent organic pollutants (including acenaphthene, acenaphthylene, phenanthrene, anthracene, fluoranthene, fluorene, naphthalene, 1-methylnaphthalene, 2-methylnaphthalene, 1-methylphenanthrene, 2,6-dimethylnaphthalene, biphenyl, benzo[j]fluoranthene, benzo[b]fluoranthene, benzo[k]fluoranthene, benzo[a]anthracene, chrysene, dibenzo[a,h]anthracene, picene, pyrene, indeno[1,2,3-cd]pyrene, benzo[g,h,i]perylene, benzo[a]pyrene, benzo[e]pyrene, perylene, hopanes, 2,3,5-trimethylnaphthalene, dibenzothiophene, retene, 4,4'-DDD, 4,4'-DDT, 4,4'-DDE, aldrin, β-endosulfan, α-hexachlorocyclohexane, β-hexachlorocyclohexane, γ-hexachlorocyclohexane, δ-hexachlorocyclohexane, dieldrin, endrin aldehyde, endrin, heptachlor, trans-heptachlor epoxide, methoxychlor, PCB209, PCB18, PCB28, PCB44, PCB52, PCB70, PCB49, PCB82, PCB101, PCB105, PCB114, PCB128, PCB138, PCB151, PCB153, PCB156, PCB170, PCB171, PCB177, PCB180, PCB183, PCB187, PCB191, PCB194, PCB195, ΣPOPs), microplastics (total detected particle count, microplastic identification rate, converted abundance, shape classification, color classification, color classification proportion, component classification, component classification proportion)], and sediment physicochemical environmental parameters [total organic carbon, sulfide, particle size (gravel, sand, silt, clay, sediment type), moisture content, ignition loss rate, heavy metals (chromium, nickel, copper, zinc, arsenic, selenium, cadmium, lead, mercury), and microplastics (total detected particle count, microplastic identification rate, converted abundance, shape classification, color classification, color classification proportion, component classification, component classification proportion)]