A Plea for Temperature in Descriptions of the Oceanic Oxygen Status
A Plea for Temperature in Descriptions of the Oceanic Oxygen Status
复制标题
DOI：
10.5670/oceanog.2014.19
复制
发表时间：
2014-03
期刊：
影响因子：
2.8
通讯作者：
P. Brewer;A. Hofmann
中科院分区：
文献类型：
--
作者：
P. Brewer;A. Hofmann
50多年来，海洋科学界传统上一直将海洋动物的缺氧极限简单地报告为独立于温度和压力的浓度值，这意味着最温暖的浅海湾或最寒冷的深峡湾的极限相同。同样，深海耗氧率通常被报告为深度的指数函数。在将温度、压力和其他多个属性隐含地组合成一个单一变量时，很难描述海洋在不断变化的气候条件下的未来。我们在这里报告了一系列最近的论文，试图提供改进的描述，通过映射海洋pO 2场，然后将其匹配到各种浓度限制的建议。我们描述的可用性O2海洋动物作为受扩散边界速率过程类似于众所周知的描述气-海气体交换。我们还描述了深海动物出口二氧化碳通过相同的边界层与已知的化学反应施加的挑战。最终的结果是一种明确的感觉，即大多数地区的海洋变暖将增加海洋生物有氧功能的压力，氧气最小区似乎比以往任何时候都更具挑战性，最深的深海海洋将保持相当有利的有氧条件。
For over 50 years, the ocean science community has traditionally reported hypoxic limits form marine animals simply as a concentration value independent of temperature and pressure, implying the same limit for the warmest shallow gulf or the coldest deep fjord. Similarly, deep-sea oxygen consumption rates are typically reported as exponential functions of depth. In implicitly combining temperature, pressure, and multiple other properties into a single variable, it becomes difficult to describe the future of an ocean under changing climate conditions. We report here on a series of recent papers that seek to provide improved descriptions, by mapping the ocean pO2 field and then matching it to the various concentration limits proposed. We describe the availability of O2 to marine animals as being governed by a diffusive boundary rate process similar to well-known descriptions of air-sea gas exchange. We also describe the challenge for a deep-sea animal exporting CO2 through the same boundary layer with known chemical reactivity imposed. The end result is a clear sense that ocean warming in most regions will add stress to the aerobic functioning of marine life, that the oxygen minimum zones appear to be more challenging than ever, and that the deepest abyssal ocean will retain quite favorable aerobic conditions.