青海海北高寒湿地近地层大气CO_2浓度的变化特征
Changes of Surface Atmospheric CO_2 Concentration in Alpine Swamp of Northern Qinghai
查看参考文献18篇
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文摘
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采用快速响应红外气体分析仪对青海海北高寒湿地大气CO_2浓度进行连续监测,分析2004年CO_2浓度变化特征表明,CO_2浓度存在明显的日、季变化,日、年内均表现"U"型变化特征.这些变化与植被生理活动、土壤呼吸、大气逆温层、及湍流交换强度等有关.自1月到7月CO_2浓度的日变化过程中,日最高值出现时间在日出前后的5:00到9:00,并随7月的到来逐渐提早,日出后下降,约在下午15:00左右为最低,日落后又逐步升高.7月以后日最高值出现时间随时间推移又滞后,最低提早.一年中,月平均浓度最低值出现在7月份,最高值则在10月.观测表明,2004年海北高寒湿地CO_2年平均浓度为315.3μmol/mol,月平均最高为335.0μmol/mol(10月),月平均最低值为270.1μmol/mol(7月).统计海北高寒湿地旬平均CO2浓度与气象因素线性相关关系表明,海北高寒湿地CO_2浓度与大多数气象因子有显著的负相关关系,但与土壤温度、气压、相对湿度等的相关关系不明显. |
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其他语种文摘
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Surface atmospheric carbon dioxide concentration was measured continuously with an anemometer's temperature and open-path CO_2 analyzer, and then CO_2 concentration change of alpine swamp in Northern Qinghai was analyzed during 2004. It was suggested that there were distinct daily and seasonal change in CO_2 concentration, present a "U" pattern changing mode during a day and a year, all those changes were correlated with vegetation physiological activity, soil respiration, atmospheric trade inversion layer and overfall exchange intensity. As for diurnal variation of CO_2 concentration from January to July, the maximum CO_2 concentration appeared during 05 :00 to 09 :00 (Beijing Standard Time), and became earlier gradually from January to July; CO_2 concentration decrease obviously after sunrise, the minimum value appeared around 15:00, and then, increased after sunset. The time of maximum CO_2 concentration was lag after July, and there was no obviously change for the time of minimum CO_2 concentration. As for monthly change, the maximum monthly average CO_2 concentration was in July and the minimum month was in October. Observation results showed that average CO_2 concentration of 2004 was 315. 3μmol o mol~(-1), the maximum monthly average was 335.0μmol o mol~(-1) (October), and the minimum monthly average was 270. lμmol o mol~(-1)(July). According, to statistic analysis results, there were negative correlations between average CO_2 concentration and most of climate factors in a period of ten days. However, there were no distinct correlation with soil temperature, air pressure and relative humidity. |
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来源
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干旱区资源与环境
,2007,21(6):108-113 【核心库】
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关键词
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高寒湿地
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近地大气
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CO_2浓度
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日、季节变化特征
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地址
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中国科学院西北高原生物研究所, 西宁, 810001
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中国科学院研究生院, 北京, 100049
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1003-7578 |
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学科
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大气科学(气象学) |
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基金
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中国科学院知识创新工程重大项目
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国家973计划
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中国-日本合作项目
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中日合作"以21世纪亚洲陆地生态系统碳管理为目标的综合碳收支研究"
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文献收藏号
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CSCD:2920897
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参考文献 共
18
共1页
|
|
1.
Ramanathan V. Trace gas trends and their potential role in climate change.
J Geophys Res,1985,90:5547-5566
|
被引
19
次
|
|
|
|
|
2.
Further P. Studies of the comparability of baseline atmospheric CO2 measurements.
Tellus,1977,29:171-181
|
被引
3
次
|
|
|
|
|
3.
Idso S B. Seasonal and diurnal variations of near-surface atmospheric CO2 concentration within a residential sector of the urban CO2 dome of Phoenix AZ USA.
Atmospheric Environment,2002,36:1655-1660
|
被引
14
次
|
|
|
|
|
4.
温玉璞. 瓦里关山大气二氧化碳浓度变化及地表排放影响的研究.
应用气象学报,1997,8(2):129-136
|
被引
36
次
|
|
|
|
|
5.
蒋高明. 城市与山地森林地区夏秋季大气CO2浓度变化初探.
环境科学学报,1998,18(1):108-111
|
被引
10
次
|
|
|
|
|
6.
王庚辰. 中国大陆上空CO_2的本底浓度及其变化.
科学通报,2002,47(10):780-783
|
被引
26
次
|
|
|
|
|
7.
吴家兵. 长白山阔叶红松林二氧化碳浓度特征.
应用生态学报,2005,16(1):49-53
|
被引
22
次
|
|
|
|
|
8.
王跃思. 北京大气CO_2浓度日变化、季变化及长期趋势.
科学通报,2002,47(14):1108-1112
|
被引
21
次
|
|
|
|
|
9.
李英年. 海北高寒草甸生态系统定位站气候、植被生产力背景的分析.
高原气象,2004,23(4):558-567
|
被引
130
次
|
|
|
|
|
10.
李英年. 祁连山海北高寒草甸地区微气候特征的观测研究.
高原气象,2000,19(4):512-519
|
被引
21
次
|
|
|
|
|
11.
曹广民. 高寒草甸不同土地利用格局土壤CO_2的释放量.
环境科学,2001,22(6):14-19
|
被引
44
次
|
|
|
|
|
12.
曹广民. 环境因子对暗沃寒冻雏形土土壤CO_2释放速率的影响.
草地学报,2001,9(4):307-312
|
被引
20
次
|
|
|
|
|
13.
赵亮. 青藏高原3种植被类型净生态系统CO2交换量的比较.
科学通报,2005,50(9):926-932
|
被引
27
次
|
|
|
|
|
14.
周凌唏. 瓦里关山大气CO2本底变化.
环境科学学报,2004,24(4):637-642
|
被引
3
次
|
|
|
|
|
15.
WMO. World data center for greenhouse gases(WDCGG)data summary.
WDCGG,2000,22:1-22
|
被引
2
次
|
|
|
|
|
16.
IPCC. The science of climate change.
Contribution of working group I to the second assessment report of the intergovernmental panel on climate change,1996:1-680
|
被引
2
次
|
|
|
|
|
17.
IPCC. Climate Change 2001:The Scientific Basis.
Contribution of working group I to the third assessment report of the intergovernmental panel on climate change,2001:1-881
|
被引
6
次
|
|
|
|
|
18.
白军红. 向海湿地贴地气层中CO2日平均浓度空间分异特征.
中国环境科学,2002,22(1):75-79
|
被引
6
次
|
|
|
|
|
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