典型文献
Temperature coefficient of seawater pH as a function of tempe-rature,pH,DIC and salinity
文献摘要：
pH is a measure of the hydrogen ion activity in a solution,which is a function of temperature.Under normal seawater conditions,it is well constrained.Nowadays,with an increasing interest in complex environments(e.g.,sea ice),a better understanding of the temperature change on pH under extreme conditions is needed.The objective of this paper was to investigate the temperature coefficient of the seawater pH(ΔpH/ΔT)over a wide range of temperature,pH,dissolved inorganic carbon(DIC)and salinity by a method of continuous pH measurement with the temperature change,and to verify the application of CO2SYS for pH conversion under extreme conditions(on the National Bureau of Standards(NBS)scale and the total proton scale).Both experimental results and CO2SYS calculations showed that ΔpH/ΔT was slightly affected by temperature over the range of 0℃to 40℃and by pH(at 25℃)from 7.8 to 8.5.However,when pH was out of this range,ΔpH/ΔT varied greatly with pH value.Δccording to the experimental results,changes in DIC from 1 mmol/kg to 5 mmol/kg and salinity from 20 to 105 had no significant effect on ΔpH/ΔT.CO2SYS calculations showed a slight increase inΔpH/ΔTwith DIC on both the NBS scale and the total proton scale;and underestimated ΔpH/ΔTat high salinity(i.e.,beyond the oceanographic range)on the NBS scale.Nevertheless,CO2SYS is still suitable for pH conversion even under extreme conditions by simply setting the input values of DIC and salinity in CO2SYS within the oceanographic range(e.g.,DIC=2 mmol/kg and S=35).
文献关键词：
中图分类号：
作者姓名：
Yubin Hu
作者机构：
Institute of Marine Science and Technology,Shandong University,Qingdao 266237,China
文献出处：
引用格式：
[1]Yubin Hu-.Temperature coefficient of seawater pH as a function of tempe-rature,pH,DIC and salinity)[J].海洋学报（英文版）,2022(06):114-118
A类：
tempe,rature,CO2SYS,ccording,Twith,oceanographic
B类：
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AB值：
0.397205
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