Methane emissions on large scales

被引:24
作者
Beswick, KM [1 ]
Simpson, TW
Fowler, D
Choularton, TW
Gallagher, MW
Hargreaves, KJ
Sutton, MA
Kaye, A
机构
[1] UMIST, Dept Phys, Manchester M60 1QD, Lancs, England
[2] Inst Terr Ecol, Penicuik EH26 0QB, Midlothian, Scotland
[3] DRA, NERC, Sci Serv ARASF, Farnborough, Hants, England
基金
英国自然环境研究理事会;
关键词
D O I
10.1016/S1352-2310(98)00080-6
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Two separate studies have been undertaken to improve estimates of methane emissions on a landscape scale. The first study took place over a palsa mire in northern Finland in August 1995. A tethered balloon and a tunable diode laser were used to measure profiles of methane in the nocturnal boundary layer. Using a simple box method or the flux gradient technique fluxes ranging from 18.5 to 658 mu mol m(-2) h(-1) were calculated. The large fluxes may be caused by advection of methane pockets across the measurement site, reflecting the heterogeneous nature of methane source strengths in the surrounding area. Under suitable conditions, comparison with nearby ground-based eddy-correlation results suggested that the balloon techniques could successfully measure fluxes on field scales. The second study was carried out by the NERC Scientific Services Atmospheric Research Airborne Support Facility using the Hercules C130 operated by the United Kingdom Meteorological Research Flight. A flight path around the northern coastline of Britain under steady West-East wind conditions enabled the measurement of methane concentrations up- and down-wind of northern Britain. Using a simple one-dimensional, constant-source diffusion model, the difference between the upwind and downwind concentrations was accounted for by methane emission from the surface. The contribution to methane emissions from livestock was also modelled. Modelled non-agricultural methane emissions decreased with increasing latitude with fluxes in northern England being a factor of 4 greater than those in northern Scotland. Since the only major methane source in northern Scotland was peat bogs, these results indicated that emissions over northern England were dominated by anthropogenic sources. Emissions from livestock accounted for 12% of the total flux over northern England, decreasing to 4% in southern Scotland and becoming negligible in northern Scotland. The total methane flux over northern Scotland was consistent with previous results from the area, indicating that this method of data analysis provided good estimates of large scale methane emissions. (C) 1998 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:3283 / 3291
页数:9
相关论文
共 18 条
[1]   AIR SAMPLING FLIGHTS ROUND THE BRITISH-ISLES AT LOW ALTITUDES - SO2 OXIDATION AND REMOVAL RATES [J].
BAMBER, DJ ;
CLARK, PA ;
GLOVER, GM ;
HEALEY, PGW ;
KALLEND, AS ;
MARSH, ARW ;
TUCK, AF ;
VAUGHAN, G .
ATMOSPHERIC ENVIRONMENT, 1984, 18 (09) :1777-1790
[2]   METHANE EMISSIONS FROM TUNDRA ENVIRONMENTS IN THE YUKON-KUSKOKWIM DELTA, ALASKA [J].
BARTLETT, KB ;
CRILL, PM ;
SASS, RL ;
HARRISS, RC ;
DISE, NB .
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 1992, 97 (D15) :16645-16660
[3]   TRACE GAS FLUX MEASUREMENTS AT THE LANDSCAPE SCALE USING BOUNDARY-LAYER BUDGETS [J].
CHOULARTON, TW ;
GALLAGHER, MW ;
BOWER, KN ;
FOWLER, D ;
ZAHNISER, M ;
KAYE, A .
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES, 1995, 351 (1696) :357-368
[4]   EDDY-CORRELATION MEASUREMENTS OF METHANE FLUXES USING A TUNABLE DIODE-LASER AT THE KINOSHEO LAKE TOWER SITE DURING THE NORTHERN WETLANDS STUDY (NOWES) [J].
EDWARDS, GC ;
NEUMANN, HH ;
DENHARTOG, G ;
THURTELL, GW ;
KIDD, G .
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 1994, 99 (D1) :1511-1517
[5]   MEASUREMENTS OF CH4 AND N2O FLUXES AT THE LANDSCAPE SCALE USING MICROMETEOROLOGICAL METHODS [J].
FOWLER, D ;
HARGREAVES, KJ ;
SKIBA, U ;
MILNE, R ;
ZAHNISER, MS ;
MONCRIEFF, JB ;
BEVERLAND, IJ ;
GALLAGHER, MW .
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES, 1995, 351 (1696) :339-355
[6]  
FOWLER D, 1996, T03065A6 I TERR EC
[7]  
GALLAGHER MW, 1994, ATMOS ENVIRON, V28, P2431
[8]   THE ARCTIC BOUNDARY-LAYER EXPEDITION (ABLE-3B) - JULY-AUGUST 1990 [J].
HARRISS, RC ;
WOFSY, SC ;
HOELL, JM ;
BENDURA, RJ ;
DREWRY, JW ;
MCNEAL, RJ ;
PIERCE, D ;
RABINE, V ;
SNELL, RL .
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 1994, 99 (D1) :1635-1643
[9]   THE ARCTIC BOUNDARY-LAYER EXPEDITION (ABLE-3A) - JULY AUGUST 1988 [J].
HARRISS, RC ;
WOFSY, SC ;
BARTLETT, DS ;
SHIPHAM, MC ;
JACOB, DJ ;
HOELL, JM ;
BENDURA, RJ ;
DREWRY, JW ;
MCNEAL, RJ ;
NAVARRO, RL ;
GIDGE, RN ;
RABINE, VE .
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 1992, 97 (D15) :16383-16394
[10]   METHANE EMISSION FROM NATURAL WETLANDS: GLOBAL DISTRIBUTION, AREA, AND ENVIRONMENTAL CHARACTERISTICS OF SOURCES [J].
Matthews, Elaine ;
Fung, Inez .
GLOBAL BIOGEOCHEMICAL CYCLES, 1987, 1 (01) :61-86