气候变化领域集成服务门户(CCPortal): Seawater carbonate chemistry and net dissolution rate for experiment of Shiraho reef

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DOI	https://doi.org/10.1594/PANGAEA.820200
	Seawater carbonate chemistry and net dissolution rate for experiment of Shiraho reef
	Yamamoto; Shoji; Kayanne; Hajime; Terai; Makoto; Watanabe; Atsushi; Kato; Ken; Negishi; Akira; Nozaki; Ken
发布日期	2012-10-14
数据集类型	dataset
英文关键词	Benthos ; Bottles or small containers/Aquaria ( 20 L) ; Calcification/Dissolution ; Coast and continental shelf ; Entire community ; Laboratory experiment ; North Pacific ; Rocky-shore community ; Temperate
英文简介	Acidification of the oceans by increasing anthropogenic CO2 emissions will cause a decrease in biogenic calcification and an increase in carbonate dissolution. Previous studies have suggested that carbonate dissolution will occur in polar regions and in the deep sea where saturation state with respect to carbonate minerals (Omega) will be <1 by 2100. Recent reports demonstrate nocturnal carbonate dissolution of reefs, despite a Omega a (aragonite saturation state) value of >1. This is probably related to the dissolution of reef carbonate (Mg-calcite), which is more soluble than aragonite. However, the threshold of Omega for the dissolution of natural sediments has not been clearly determined. We designed an experimental dissolution system with conditions mimicking those of a natural coral reef, and measured the dissolution rates of aragonite in corals, and of Mg-calcite excreted by other marine organisms, under conditions of Omega a > 1, with controlled seawater pCO2. The experimental data show that dissolution of bulk carbonate sediments sampled from a coral reef occurs at Omega a values of 3.7 to 3.8. Mg-calcite derived from foraminifera and coralline algae dissolves at Omega a values between 3.0 and 3.2, and coralline aragonite starts to dissolve when Omega a = 1.0. We show that nocturnal carbonate dissolution of coral reefs occurs mainly by the dissolution of foraminiferans and coralline algae in reef sediments.
空间范围	Latitude: 24.367000 * Longitude: 124.250000
语种	英语
国家	国际
学科大类	气候变化
学科子类	气候变化
文献类型	数据集
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/217584
推荐引用方式 GB/T 7714	Yamamoto,Shoji,Kayanne,et al. Seawater carbonate chemistry and net dissolution rate for experiment of Shiraho reef.2012-10-14.https://doi.org/10.1594/PANGAEA.820200.