Groundwater flow and dissolved carbon movement in a boreal peatland

被引:127
作者
Waddington, JM
Roulet, NT
机构
[1] YORK UNIV, DEPT GEOG, N YORK, ON M3J 1PZ, CANADA
[2] MCGILL UNIV, DEPT GEOG, MONTREAL, PQ H3A 2K6, CANADA
[3] MCGILL UNIV, CTR CLIMATE & GLOBAL CHANGE RES, MONTREAL, PQ H3A 2K6, CANADA
基金
加拿大自然科学与工程研究理事会;
关键词
D O I
10.1016/S0022-1694(96)03075-2
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
Measurement of the groundwater flux and the consequent advection of dissolved carbon (DOC (dissolved organic carbon), CH4 and CO2) were made in a boreal peatland in northern Sweden in summer 1993. The early summer gradients in hydraulic head indicated a downward flux of water in the peatland, but after a persistent mid-summer dry period the gradients changed to produce an outward radial flow from the centre to the mar ins of the peatland, This shift in gradients corresponded to the removal of some of CH4 and CO2 dissolved in groundwater. The concentrations of dissolved CH4 and CO2 were, spatially variable, with the highest observed in the centre of the peatland. In contrast, DOC concentrations were relatively constant near the centre of the peatland and switched in the margin from being the highest during dry periods to lowest during wet periods. The changes in concentration of CH4, CO2, and DOC are a function of the seasonal patterns of production and consumption, but groundwater Row is significant in the redistribution of dissolved carbon and the spatial patterns of concentration. The calculated mass flux of dissolved carbon was significant: it was approximately 20% of annual CO2 fixation. (C) 1997 Elsevier Science B.V.
引用
收藏
页码:122 / 138
页数:17
相关论文
共 38 条
[1]  
[Anonymous], 1981, WATER MOVEMENT MIREL
[2]   CARBON ISOTOPIC COMPOSITION OF DEEP CARBON GASES IN AN OMBROGENOUS PEATLAND, NORTHWESTERN ONTARIO, CANADA [J].
ARAVENA, R ;
WARNER, BG ;
CHARMAN, DJ ;
BELYEA, LR ;
MATHUR, SP ;
DINEL, H .
RADIOCARBON, 1993, 35 (02) :271-276
[3]   PATTERNS OF CHANGE IN THE CARBON BALANCE OF ORGANIC SOIL-WETLANDS OF THE TEMPERATE ZONE [J].
ARMENTANO, TV ;
MENGES, ES .
JOURNAL OF ECOLOGY, 1986, 74 (03) :755-774
[4]  
BAY R R, 1969, Journal of Hydrology (Amsterdam), V9, P90, DOI 10.1016/0022-1694(69)90016-X
[5]   AN OMBROTROPHIC BOG AS A METHANE RESERVOIR [J].
Brown, Ann ;
Mathur, S. P. ;
Kushner, D. J. .
GLOBAL BIOGEOCHEMICAL CYCLES, 1989, 3 (03) :205-213
[6]   THE RELATION BETWEEN MOVEMENT OF SUBSURFACE WATER AND GASEOUS METHANE IN A BASIN BOG WITH A NOVEL INSTRUMENT [J].
BUTTLER, AJ ;
DINEL, H ;
LEVESQUE, M ;
MATHUR, SP .
CANADIAN JOURNAL OF SOIL SCIENCE, 1991, 71 (04) :427-438
[7]  
Charman Daniel J., 1992, Suo (Helsinki), V43, P199
[8]   CARBON DYNAMICS IN A FORESTED PEATLAND IN NORTH-EASTERN ONTARIO, CANADA [J].
CHARMAN, DJ ;
ARAVENA, R ;
WARNER, BG .
JOURNAL OF ECOLOGY, 1994, 82 (01) :55-62
[9]  
DALVA M, 1991, BIOGEOCHEMISTRY, V15, P1
[10]  
Freeze A.R., 1979, GROUNDWATER