Empirical algorithms to estimate water column pH in the Southern Ocean
Empirical algorithms to estimate water column pH in the Southern Ocean
复制标题
估算南大洋水柱 pH 值的经验算法
DOI：
10.1002/2016gl068539
复制
发表时间：
2016
影响因子：
5.2
通讯作者：
R. Wanninkhof
中科院分区：
文献类型：
--
作者：
Nancy L. Williams;L. Juranek;Kenneth S. Johnson;R. Feely;S. Riser;Lynne D. Talley;Joellen Russell;Jorge L. Sarmiento;R. Wanninkhof
经验算法是使用高质量的Go-Ship水文测量对常用的测量参数(温度、盐度、压力、硝酸盐和氧)进行开发的，这些参数估计了南大洋太平洋部分的pH值。测定系数R2分别为0.98和0.97，均方根误差分别为0.010和0.008。这些算法被应用于南大洋碳与气候观测和模拟(SOCCOM)生物地球化学剖面浮标，其中包括新型传感器(pH、硝酸盐、氧、荧光和后向散射)。这些算法被用来估计没有pH传感器的浮标上的pH，并验证和调整来自有pH传感器的浮标的pH传感器数据。调整后的浮标数据首次提供了南大洋太平洋部分表层酸碱度在周分辨率上的季节性周期，在周分辨率上从0.05到0.08。
Empirical algorithms are developed using high‐quality GO‐SHIP hydrographic measurements of commonly measured parameters (temperature, salinity, pressure, nitrate, and oxygen) that estimate pH in the Pacific sector of the Southern Ocean. The coefficients of determination, R2, are 0.98 for pH from nitrate (pHN) and 0.97 for pH from oxygen (pHOx) with RMS errors of 0.010 and 0.008, respectively. These algorithms are applied to Southern Ocean Carbon and Climate Observations and Modeling (SOCCOM) biogeochemical profiling floats, which include novel sensors (pH, nitrate, oxygen, fluorescence, and backscatter). These algorithms are used to estimate pH on floats with no pH sensors and to validate and adjust pH sensor data from floats with pH sensors. The adjusted float data provide, for the first time, seasonal cycles in surface pH on weekly resolution that range from 0.05 to 0.08 on weekly resolution for the Pacific sector of the Southern Ocean.