Patterns of deoxygenation: sensitivity to natural and anthropogenic drivers
Patterns of deoxygenation: sensitivity to natural and anthropogenic drivers
复制标题
脱氧模式:对自然和人为驱动因素的敏感性
DOI:
10.1098/rsta.2016.0325
复制
发表时间:
2017
期刊:
影响因子:
--
通讯作者:
Schmidtko
中科院分区:
文献类型:
--
作者:
Oschlies;Duteil;Getzlaff;Landolfi;Schmidtko
Observational estimates and numerical models both indicate a significant overall decline in marine oxygen levels over the past few decades. Spatial patterns of oxygen change, however, differ considerably between observed and modelled estimates. Particularly in the tropical thermocline that hosts open-ocean oxygen minimum zones, observations indicate a general oxygen decline, whereas most of the state-of-the-art models simulate increasing oxygen levels. Possible reasons for the apparent model-data discrepancies are examined. In order to attribute observed historical variations in oxygen levels, we here study mechanisms of changes in oxygen supply and consumption with sensitivity model simulations. Specifically, the role of equatorial jets, of lateral and diapycnal mixing processes, of changes in the wind-driven circulation and atmospheric nutrient supply, and of some poorly constrained biogeochemical processes are investigated. Predominantly wind-driven changes in the low-latitude oceanic ventilation are identified as a possible factor contributing to observed oxygen changes in the low-latitude thermocline during the past decades, while the potential role of biogeochemical processes remains difficult to constrain. We discuss implications for the attribution of observed oxygen changes to anthropogenic impacts and research priorities that may help to improve our mechanistic understanding of oxygen changes and the quality of projections into a changing future.This article is part of the themed issue ‘Ocean ventilation and deoxygenation in a warming world’.
登录
查看更多内容
影响因子:
5.2
作者:
N. Ridder;M. England
通讯作者:
M. England
影响因子:
64.8
作者:
Brandt;A. Funk;V. Hormann;M. Dengler;R. Greatbatch;J. Toole
通讯作者:
J. Toole
影响因子:
64.8
作者:
KEELING, RF;SHERTZ, SR
通讯作者:
SHERTZ, SR
DOI:
--
发表时间:
2016
期刊:
影响因子:
--
作者:
E. Montes;F. Muller‐Karger;A. Cianca;M. Lomas;L. Lorenzoni;S. Habtes
通讯作者:
S. Habtes
影响因子:
5.2
作者:
Duteil, O.;Oschlies, A.
通讯作者:
Oschlies, A.