• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Continental Shelf Research: A Companion Journal to Deep-Sea Research and Progress in Oceanography >Acidifying intermediate water accelerates the acidification of seawater on shelves: An example of the East China Sea
【24h】

Acidifying intermediate water accelerates the acidification of seawater on shelves: An example of the East China Sea

机译：对中间水进行酸化可加速架子上海水的酸化：东海的一个例子

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This study is the first to present observed acidification rates at the shelf break of the East China Sea (ECS) and in the Okinawa Trough between 1982 and 2007. The use of apparent oxygen utilization (AOU) data to quantify the change in pH due to physical changes and changes in biological activities is demonstrated. The results thus obtained reveal that the drop in pH of the Kuroshio Intermediate Water (KIW) in the ECS is a result of not only the intrusion of atmospheric CO2, but also an increase in AOU concentration. The acidification rates caused by the increasing AOU concentration could contribute up to -0.00086 +/- 0.00017 pH unit yr(-1) at 900 m in the Okinawa Trough and -0.00082 +/- 0.00057 pH unit yr(-1) on the shelf break of the ECS. These values are equivalent to 54% and 51%, respectively, of the acidification rate of -0.0016 pH unit yr(-1) based on an assumption of the air-sea CO2 equilibrium. When the effects of changing AOU and 9 are eliminated, the acidification rate in the basin of the ECS captures the rate of change that is caused by an increase in anthropogenic CO2 concentration. In contrast, when the effects of changing AOU and 9 are eliminated, the acidification rate at the shelf break is 69% higher than the rate based on an assumption of the air-sea CO2 equilibrium. Since the seawater on the shelf contains a higher proportion of the South China Sea (SCS) seawater and coastal water than does that in the Okinawa Trough, the result herein may imply that the SCS seawater, coastal water, or a combination of them suffered a higher acidification rate during the studied period. This study, to the best of the authors' knowledge, is the first to demonstrate that changing the carbonate chemistry of both incoming offshore intermediate seawater and coastal water results in the acidification of seawater on a continental shelf. The results herein reveal a situation in which the acidification of coastal seawater may be faster than expected when the reduction of pH of the incoming offshore seawater is considered along with the increasing atmospheric CO2 and terrestrial nutrient fluxes. (C) 2015 Elsevier Ltd. All rights reserved.
机译：这项研究是第一个提出在1982年至2007年之间在东海陆架断裂和冲绳海槽观测到的酸化率的研究。利用表观氧气利用率（AOU）数据来量化由于身体的变化和生物活动的变化得到了证明。由此获得的结果表明，ECS中的黑潮中间水（KIW）的pH下降不仅是大气CO2侵入的结果，而且是AOU浓度增加的结果。在冲绳海槽900 m处，由AOU浓度增加引起的酸化速率可贡献高达-0.00086 +/- 0.00017 pH单位yr（-1）和-0.00082 +/- 0.00057 pH单位yr（-1）。 ECS中断。基于空气-海洋CO2平衡的假设，这些值分别相当于-0.0016 pH单位yr（-1）的酸化率的54％和51％。如果消除了改变AOU和9的影响，则ECS盆地中的酸化速率将捕获由人为CO2浓度增加引起的变化速率。相反，当消除了改变AOU和9的影响时，货架期的酸化率比基于海气CO2平衡假设的酸化率高69％。由于架子上的海水比冲绳海槽中所含的南中国海（SCS）海水和沿海水含量更高，因此此处的结果可能暗示SCS海水，沿海水或它们的组合遭受了在研究期间酸化率较高。据作者所知，这项研究是第一个证明改变进入的中间中间海水和沿海水域的碳酸盐化学成分会导致大陆架上的海水酸化的研究。本文的结果揭示了一种情况，其中当考虑引入的离岸海水的pH值降低以及大气中CO2和陆地营养通量的增加时，沿海海水的酸化速度可能比预期的要快。 （C）2015 Elsevier Ltd.保留所有权利。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号