Modeling Methane Emissions from Paddy Rice Fields under Elevated Atmospheric Car

排行榜 收藏 打印 发给朋友 举报 来源: 《Advances in Atmospheric Sciences》 发布者:cjk3d
热度8票 浏览11次 【共0条评论】【我要评论 时间:2012年4月15日 22:18

;N)J"D3H^0Modeling Methane Emissions from Paddy Rice Fields under Elevated Atmospheric Carbon Dioxide Conditions

)u1[Cw1w]3N)In0 水利论文U"d"_Dk'{y|6\:B2D

Abstract:Abstract Methane (CH4) emissions from paddy rice fields substantially contribute to the dramatic increase of this greenhouse gas in the atmosphere. Due to great concern about climate change, it is necessary to predict the effects of the dramatic increase in atmospheric carbon dioxide (CO2) on CH4 emissions from paddy rice fields. CH4MOD 1.0 is the most widely validated model for simulating CH4 emissions from paddy rice fields exposed to ambient CO2 (hereinafter referred to as aCO2). We upgraded the model to CH4MOD 2.0 by: (a) modifying the description of the influences of soil Eh and the water regime on CH4 production; (b) adding new features to reflect the regulatory effects of atmospheric CO2 upon methanogenic substrates, soil Eh during drainages, and vascular CH4 transport; and (c) adding a new feature to simulate the influences of nitrogen (N) addition rates on methanogenic substrates under elevated CO2 (hereinafter referred to as eCO2) condition. Validation with 109 observation cases under aC02 condition showed that CHaMOD 2.0 possessed a minor systematic bias in the prediction of seasonally accumulated methane emissions (SAM). Validation with observations in free-air CO2 enrichment (FACE) experiments in temperate and subtropical climates showed that CH4MOD 2.0 successfully simulated the effects of eCO2 upon SAM from paddy rice fields incorporated with various levels of previous crop residues and/or N fertilizer. Our results imply that CH4MOD 2.0 provides a potential approach for estimating of the effects of elevated atmospheric CO2 upon CHa emissions from regional or global paddy rice fields with various management practices in a changing climate.

+j4l~!J4QWF d0 水利论文+}Mb'LX%w0m$f z0pa

作者:水利论文 G/g+j7h*~t

(iMF gt&I0i0Author:

{\?6b7s@5_Z3J-O0

-k#X#K4[b d?:Z`0作者单位:

0B4~ CB*jU:y0 水利论文/iw%d!B;Cw I7|

期 刊:

PbxC Ub0

2N+z{T^Ah$X0大气科学进展(英文版)

S-@aBk1a'gU0

7Ni.pBGr;K?2N0Journal:

U%q3m&Cnpqd0

*|'g Hg*`!}Q5q0Advances in Atmospheric Sciences水利论文"C ev*MvQ)`

水利论文'I9q4Z"r,j#J

年,卷(期):

N6b/o}Oj"gp(jyc!Y0 水利论文 g _0Y3~ W

2010, (1)水利论文 R$L5t \ e7dz'E

水利论文 @ orr-u\g1}

分类号:水利论文{h{cs8e

水利论文|b/d4@6OV k

S792.153 X511水利论文{` SuTp*]

水利论文d,r}]m;]4B

关键词:水利论文*Nz,wI5^&[

水利论文7D-^4Q2E0u];buU

二氧化碳浓度升高水利论文D)Zn `K%i+o.V

cHJI,~,oE5x A$Y9W0甲烷排放

l7tni;v7E,_^2BU0

J}Op H5sl'tu0水稻田水利论文n1Q~+B"HnS*Jm@ K

#i@} OE&o0f \O)p0大气水利论文BUn.W(VQ

^Px AB0模拟水利论文ST;qs#nv

水利论文1V~_A2{5R [0ZY

Keywords:水利论文9k{ XSa8nn+L G]

水利论文$k2x6it*E?7e

modeling

!H0[K:K8xMn}0

MjOU"L0carbon dioxide (CO2)水利论文+B,L~0A N4T_y

e,c6NI#Ou0methane (CH4)水利论文bby+o#~pBAd3E{

_Jd ~vJ J.b w(p0free-air CO2 enrichment (FACE)

^#wh8\;]l8n0 水利论文Tj ~u{9m urrC+P|$K

CH4MOD

Rxe,PP#w0 水利论文 G4t@6YT,yME

paddy

X;tQ R J\0 水利论文7dDAeQ

机标分类号:水利论文!u.?4{^*X8f%|,_

水利论文 z'K9A_ ~ D;Uw9L

X51 S1

$y Z:cA }0 水利论文 yL(C T8k r&CF I

机标关键词:

nU!slZ0 水利论文L5vA6`&L C

Carbon Dioxide Rice Fields Methane Emissions rice fields paddy rice management practices influences CO2 methane emissions systematic bias CH4 climate change carbon dioxide water regime model features changing approach addition Abstract水利论文8S(W] _r

2\O/x6M!Fv)ap0y0基金项目:水利论文,J'@_%Ei:o.{

水利论文Bd]"K Ae&u%s7h

返回顶部互动百科相关词水利论文#HXt}*f8D9S*[ ?1TN.h

下一篇:Diurnal Variability of Precipitation Depth Over the Tibetan Plateau and Its Surr
上一篇:Development Processes of the Tropical Pacific Meridional Mode
查看全部回复【已有0位网友发表了看法】

广告投放

广告投放