RIVERINE TRANSPORT OF ATMOSPHERIC CARBON - SOURCES, GLOBAL TYPOLOGY AND BUDGET

被引：279

作者：

MEYBECK, M

机构：

[1] Laboratoire de Géologie Appliquée, C.N.R.S.Place Jussieu, Paris Cedex 05

来源：

WATER AIR AND SOIL POLLUTION | 1993年 / 70卷 / 1-4期

关键词：

D O I：

10.1007/BF01105015

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Atmospheric C (TAC) is continuously transported by rivers at the continents' surface as soil dissolved and particulate organic C (DOC, POC) and dissolved inorganic C (DIC) used in rock weathering reactions. Global typology of the C export rates (g.m-2.yr-1) for 14 river classes from tundra rivers to monsoon rivers is used to calculate global TAC flux to oceans estimated to 542 Tg.yr-1, of which 37 % is as DOC, 18 % as soil POC and 45 % as DIC. TAC originates mostly from humid tropics (46 %) and temperate forest and grassland (31 %), compared to boreal forest (14 %), savannah and sub-arid regions (5 %), and tundra (4 %). Rivers also carry to oceans 80 Tg. yr-1 of POC and 137 TG.yr-1 of DIC originating from rock erosion. Permanent TAC storage on land is estimated to 52 Tg.yr-1 in lakes and 17 Tg.yr-1 in internal regions of the continents.

引用

页码：443 / 463

页数：21

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