Controls on buffering and coastal acidification in a temperate estuary
Controls on buffering and coastal acidification in a temperate estuary
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温带河口缓冲和沿海酸化的控制
DOI：
10.1002/lno.12085
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发表时间：
2022
影响因子：
4.5
通讯作者：
Vandemark, Douglas
中科院分区：
文献类型：
--
作者：
Hunt, Christopher W.;Salisbury, Joseph E.;Vandemark, Douglas
河口可能是唯一容易受到大气驱动的海洋酸化（OA），生物驱动的CO2输入从河口本身，和陆地上的淡水输入的综合酸化压力。本研究利用美国东北部温带大海湾河口连续测量的总碱度（TA）和二氧化碳分压（pCO 2），研究了端元混合和海洋地球化学转化对河口缓冲能力（β-H）的潜在影响。在2016年5月至2019年12月的28个月内每小时收集观察结果。结果表明，端元混合解释了大部分的TA和溶解无机碳（DIC），浓度随季节变化强烈观察到的变异。在一年中的大部分时间里，混合也决定了盐度标准化TA和DIC的相对比例，但秋季这些比例的变化表明观察到有氧呼吸，这将通过减少TA和增加DIC来减少β-H。然而，秋季也是盐度与TA和DIC之间统计对应性最弱的季节，以及总盐度、TA和β-H最高的季节。潜在的生态地球化学驱动的β-H下降被沿海海水提供的缓冲能力增加所掩盖。一个简单的模拟实验表明，混合过程控制了TA和DIC的大部分月变化，掩盖了海气交换或代谢过程的影响。平流混合的贡献可能是重要的生态地球化学驱动的变化，以观察评估当地河口和沿海OA。
Estuaries may be uniquely susceptible to the combined acidification pressures of atmospherically driven ocean acidification (OA), biologically driven CO2inputs from the estuary itself, and terrestrially derived freshwater inputs. This study utilized continuous measurements of total alkalinity (TA) and the partial pressure of carbon dioxide (pCO2) from the mouth of Great Bay, a temperate northeastern U.S. estuary, to examine the potential influences of endmember mixing and biogeochemical transformation upon estuary buffering capacity (β–H). Observations were collected hourly over 28 months representing all seasons between May 2016 and December 2019. Results indicated that endmember mixing explained most of the observed variability in TA and dissolved inorganic carbon (DIC), concentrations of which varied strongly with season. For much of the year, mixing dictated the relative proportions of salinity‐normalized TA and DIC as well, but a fall season shift in these proportions indicated that aerobic respiration was observed, which would decreaseβ–Hby decreasing TA and increasing DIC. However, fall was also the season of weakest statistical correspondence between salinity and both TA and DIC, as well as the overall highest salinity, TA andβ–H. Potential biogeochemically drivenβ–Hdecreases were overshadowed by increased buffering capacity supplied by coastal ocean water. A simple modeling exercise showed that mixing processes controlled most monthly changes in TA and DIC, obscuring impacts from air–sea exchange or metabolic processes. Advective mixing contributions may be as important as biogeochemically driven changes to observe when evaluating local estuarine and coastal OA.
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西北大西洋大陆架海洋学 (1,W)
DOI：
--
发表时间：
2004
期刊：
影响因子：
--
作者：
D. Townsend;A. Thomas;L. Mayer;M. A. Thomas;J. A. Quinlan
通讯作者：
J. A. Quinlan
影响因子：
4.9
作者：
Hagens, M.;Slomp, C. P.;Middelburg, J. J.
通讯作者：
Middelburg, J. J.
使用连续和离散采样方法测量地表水中二氧化碳的逸度
影响因子：
3
作者：
R. Wanninkhof;K. Thoning
通讯作者：
K. Thoning
影响因子：
2.8
作者：
Gledhill, Dwight K.;White, Meredith M.;Doney, Scott C.
通讯作者：
Doney, Scott C.
影响因子：
3
作者：
C. W. Hunt;J. Salisbury;D. Vandemark;Steffen Aßmann;P. Fietzek;C. Melrose;R. Wanninkhof;K. Azetsu-Scott
通讯作者：
C. W. Hunt;J. Salisbury;D. Vandemark;Steffen Aßmann;P. Fietzek;C. Melrose;R. Wanninkhof;K. Azetsu-Scott