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中国科学院大气物理研究所专利：同步测量N2O、CH4和CO2通量的涡动相关法装置
全球目前一半以上的人口居住在城市区域，并且，随着城市化进程的进一步加快，更多的自然和农业生态系统被转化为城市生态系统。城市绿地，作为城市生态系统中用于改善生态环境质量的重要组成部分，其对大气二氧化碳（CO2）的吸收和固定作用已经得到许多研究的证实。然而，关于城市化引起的土地利用变化（即自然和农业生态系统转变为城市绿地）对土壤非CO2温室气体（甲烷（CH4）和氧化亚氮（N2O））排放的定量影响仍然知...
全球目前一半以上的人口居住在城市区域，并且，随着城市化进程的进一步加快，更多的自然和农业生态系统被转化为城市生态系统。城市绿地，作为城市生态系统中用于改善生态环境质量的重要组成部分，其对大气二氧化碳（CO2）的吸收和固定作用已经得到许多研究的证实。然而，关于城市化引起的土地利用变化（即自然和农业生态系统转变为城市绿地）对土壤非CO2温室气体（甲烷（CH4）和氧化亚氮（N2O））排放的定量影响仍然知...
中国科学院大气物理研究所碳氮循环研究团队联合北京市园林科学研究院，对北京市多种典型城市草地（暖季型、冷季型草地和林下耐阴地被）N2O和NO排放通量进行了完整周年的原位观测研究。
茶，作为最大众化、最受欢迎的健康饮品，在区域和全球农业经济发展和文化传播方面具有重要作用。截止目前，全世界有超过62个国家种植茶叶，面积达到490万公顷；中国作为茶叶的故乡，其种植面积和产量均居世界首位。全球茶树种植的普遍特点是生长在高热高湿、透水性良好的酸性土壤中，并且随着茶树的生长，茶园土壤中的有机质含量逐渐增加。再者，为了追求茶叶的产量和提高茶叶的品质，茶农往往对茶园施用大量氮肥，施肥量通常...
氧化亚氮（N2O）、甲烷（CH4）和二氧化碳（CO2）是大气中最重要的三种温室气体。基于湍流理论的涡动相关法是测量地气间温室气体交换通量的理想方法，该方法对生态系统干扰小，并可获得长时间序列的观测数据。然而，目前现有的基于涡动相关法的观测设备只能有效测量上述三种气体中的一种或至多两种气体的通量。王凯、王东（博士生）和郑循华所在的碳氮循环团队采用一台闭路量子级联激光（QCL）气体分析仪和相关设备配件...
本文利用美国国家大气环境中心(NCAR)的二维化学、辐射和动力相互作用的模式(SOCRATES),模拟了大气中N2O增加对O3和温度的影响,并从化学、辐射和动力过程讨论了影响原因,此外还与大气甲烷和平流层水汽增加对大气环境的影响进行了对比.分析表明:大气中N2O浓度增加以后,将通过化学过程引起30 km以上O3损耗,30~40 km损耗较多;30 km以上降温明显,下平流层中低纬度地区以及对流层O...
UV absorption cross sections of nitrous oxide (N2O) and carbon tetrachloride (CCl4) between 210 and 350 K and the atmospheric implications
UV absorption nitrous oxide (N2O) carbon tetrachloride (CCl4) the atmospheric implications
2010/8/16
Absorption cross sections of nitrous oxide (N2O) and carbon tetrachloride (CCl4) are reported at five atomic UV lines (184.95, 202.548, 206.200, 213.857, and 228.8 nm) at temperatures in the range 210...
Regional N2O fluxes in Amazonia derived from aircraft vertical profiles
Regional N2O fluxes Amazonia aircraft vertical profiles
2009/12/3
Nitrous oxide (N2O) is the third most important anthropogenic greenhouse gas. Globally, the main sources of N2O are nitrification and denitrification in soils. About two thirds of the soil emissions o...
Effect of water addition and nitrogen fertilization on the fluxes of CH4, CO2, NOx, and N2O following five years of elevated CO2 in the Colorado Shortgrass Steppe
nitrogen fertilization CH4 CO2 NOx N2O Colorado Shortgrass Steppe
2009/3/11
An open-top-chamber (OTC) CO2 enrichment (~720 mmol mol-1) study was conducted in the Colorado shortgrass steppe from April 1997 through October 2001. Aboveground plant biomass increased under elevate...
The isotopic fingerprint of the pre-industrial and the anthropogenic N2O source
isotopic fingerprint pre-industrial anthropogenic N2O
2009/3/10
We have performed high-precision measurements of the 18O and position dependent 15N isotopic composition of N2O from Antarctic firn air samples. By comparing these data to simulations carried out with...
Wavelength dependence of isotope fractionation in N2O photolysis
Wavelength dependence isotope fractionation N2O photolysis
2009/3/10
In previous reports on isotopic fractionation in the ultraviolet photolysis of nitrous oxide (N2O) only enrichments of heavy isotopes in the remaining N2O fraction have been found. However, most direc...
Shipborne solar absorption measurements of CO2, CH4, N2O and CO and comparison with SCIAMACHY WFM-DOAS retrievals
Shipborne solar absorption measurements CO2 CH4 N2O CO SCIAMACHY WFM-DOAS retrievals
2009/2/13
CO, CH4, N2O and CO2 were retrieved from high resolution solar absorption spectra obtained during a ship cruise from Capetown to Bremerhaven in January/February 2003 by Fourier Transform Infrared (FTI...
Comparisons between SCIAMACHY and ground-based FTIR data for total columns of CO, CH4, CO2 and N2O
SCIAMACHY ground-based FTIR data CO CH4 CO2 N2O
2009/1/8
Total column amounts of CO, CH4, CO2 and N2O retrieved from SCIAMACHY nadir observations in its near-infrared channels have been compared to data from a ground-based quasi-global network of Fourier-tr...
On the ability of chemical transport models to simulate the vertical structure of the N2O, NO2 and HNO3 species in the mid-latitude stratosphere
chemical transport models vertical structure N2O HNO3 species mid-latitude stratosphere
2009/1/7
In this paper we study the impact of the modelling of N2O on the simulation of NO2 and HNO3 by comparing in situ vertical profiles measured at mid-latitudes with the results of the Reprobus 3-D CTM (T...