2023年3月29日 · Anthropogenic emissions of carbon dioxide (CO 2), methane (CH 4) and nitrous oxide (N 2 O) have made significant contributions to global warming since the pre-industrial period and are therefore...

2025年3月14日 · Estimates of the globally-averaged CH 4 abundance (monthly- and annually-averaged means), and the annual increase, are updated every month as new samples are returned to Boulder, measured for CH 4, and added to the analysis. Adding new, more recent data improves the accuracy of the initial estimate by increasing the spatial density of data and ...

2010年11月12日 · Nitrous oxide (N 2 O) and methane (CH 4) are chemically reactive greenhouse gases with well-documented atmospheric concentration increases that are attributable to anthropogenic activities. We quantified the link between N 2 O and CH 4 emissions through the coupled chemistries of the stratosphere and troposphere.

2025年1月6日 · CH 4 and N 2 O are critical non-CO 2 greenhouse gases (GHGs) that collectively contribute to more than one-quarter of anthropogenic global warming, accounting for ∼35%–45% of the total climate forcing [1]. China is the world's largest emitter of CH 4 and N 2 O, accounting for 17.88% and 16.67% of global emissions, respectively [2].

2025年1月1日 · Variable emission factors of CH 4 an N 2 O from WWTPs were systematically analyzed. Average EF CH4 and EF N2O are 0.11% BOD in and 0.17% N 2 O in, respectively. Regression and neural networks were respectively applied to model EF CH4 and EF N2O. WWTPs without monitoring EFs could estimate carbon footprints by the modeled results.

2011年5月13日 · In this study, we used a process-based ecosystem model driven by multiple environmental factors to examine the net warming potential resulting from net exchanges of CO 2, CH 4, and N 2 O between China's terrestrial ecosystems and the atmosphere during 1961–2005.

CH 4 的全球增温潜势（global warming potential, GWP）是二氧化碳（CO 2 ）的27或29.8倍, N 2 O的GWP是CO 2 的273倍 . 2014年, CH 4 和N 2 O排放分别占中国总温室气体排放量的9%和5%, 且呈增长趋势 . 河流是重要的CH 4 和N 2 O排放源.

本文利用高光谱分辨率的辐射传输模式,计算了ch 4 、n 2 o在晴空大气和有云大气条件下的瞬时辐射效率和平流层调整的辐射效率,以及它们的全球增温潜能(gwp)和全球温变潜能(gtp),并根据模式结果拟合了ch 4 和n 2 o的辐射强迫的简单计算公式。

2020年3月11日 · 估算了全球ch4和n2o的排放通量；探讨了气候、co2、o3、氮沉降、土地利用变化、氮肥施用等多种环境因素对ch4和n2o排放年际变化的影响；比较了ch4和n2o的排放通量在区域、生态系统类型和纬度上的差异。

检测气体：甲烷CH4、一氧化二氮N2O，选配二氧化碳CO2. 范围分辨率： CH4：量程0-1000ppm、分辨率0.01ppm，进口高精度TDLAS激光传感器. N2O：量程0-100ppm、分辨率0.01ppm，进口长光程红外传感器. 精度误差：≤±2%F.S.（更高精度可订制） 重 复 性：≤±1%