大气中人为对公开海洋的影响
R A Duce1, J LaRoche, K Altieri
1Departments of Oceanography and Atmospheric Sciences, Texas A&M University, College Station, TX 77843, USA.
Science (New York, N.Y.)
|May 20, 2008
概括
大气中的沉积对海洋生态系统产生了重大影响,提供了必需的营养素,但也增加了氧化 (N2O) 排放. 这种对二氧化碳吸收的肥效应在很大程度上被N2O,一种强大的温室气体所抵消.
科学领域:
- 海洋学 海洋学 海洋学
- 大气化学 大气化学
- 生物地质化学循环的过程
背景情况:
- 大气中人为固定的增加影响了海洋预算.
- 沉积代表了开放海洋的大量外部营养物质供应.
- 这一过程影响了海洋生物生产和温室气体排放.
研究的目的:
- 量化大气沉积对海洋供应的影响.
- 评估这种沉积对海洋生物生产和碳吸收的影响.
- 评估净辐射强迫影响,考虑二氧化碳吸收和二氧化 (N2O) 释放.
主要方法:
- 这项研究可能涉及分析全球气预算和海洋数据.
- 它可以利用生物地球化学模型来模拟营养输入和生物反应.
- 对大气沉积,新产量和温室气体流量的量化是至关重要的.
主要成果:
- 大气中的提供了海洋外部供应的三分之一.
- 这种投入支持大约3%的新海洋生物产量 (0.3 Pg C/yr).
- 每年可产生高达1.6Tg的N2O,抵消二氧化碳吸收收益.
结论:
- 大气中沉积是海洋生物地球化学的重要驱动因素.
- 在提高碳吸收的同时,它同时增加了氧化排放.
- 净气候影响是复杂的,由于N2O增加,气候可能变暖.
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