>上个月,低对流层温度下降了0.28°C从二月到三月,这似乎是一个巨大的下降,即使是由于季节性原因。这不是什么链接的文章说。它不是说每月低对流层温度UAH异常下降了0.28°C从2月到3月。月度温度异常的区别是月在某些年的全球平均温度和全球平均气温月基线组多年,1981年到2010年的UAH温度异常。季节性温度变化往往是在陆地比海洋更强。另一个是北半球包含更多的土地比南半球。这两个的组合效应使全球气温表现出季节性变化,反映了北半球的季节。2月至3月标志着从气象冬季气象春季(3月1日而不是3月22日)开始。预计3月比2月,温暖全世界。这正是GISTEMP记录显示:[![enter image description here][1]][1] source: https://data.giss.nasa.gov/gistemp/graphs_v4 It's clear from the above graph that the world has been warming since 1880. The graph below portrays monthly GISTEMP temperature anomalies for recent years: [![enter image description here][2]][2] source: Same as above The key relevant features from the above graphs is that the monthly GISTEMP temperature for March 2020 was 0.62°C higher than that for February 2020, but the monthly GISTEMP temperature anomaly for March 2020 was 0.06°C lower than that for February 2020. fell by 0.06°C from February 2020 to March 2020. Thus GISTEMP, which is based on temperature measurements near the surface, may have seen a muted version of the effect observed in the UAH data, which are based on satellite observations. I used "may have" because the 0.06°C drop seen by the GISTEMP model is barely above the 0.05°C uncertainty claimed for that model. The UAH model claims the same uncertainty (0.05°C), so their reported 0.28°C drop was apparently real. > My question is, is lower tropospheric temperature relevant to measuring global warming? The graph below compares surface-based measures (MET office, NASA, and NOAA) with satellite-based estimates (RSS and UAH). The MET office data starts in 1850 while the satellite data (UAH and RSS) don't start until 1981. [![enter image description here][3]][3] source: https://www.carbonbrief.org/explainer-how-surface-and-satellite-temperature-records-compare All five datasets see the same general picture, which is temperatures generally rising, but with noisy peaks and troughs. Sometimes the satellite-based observations show variations that are not seen in the surface-based measurements, and other times it's the other way around. But in general, both see warming. The satellites do not carry tethered thermometers that measure temperature at various heights in the atmosphere. They instead measure the intensities of electromagnetic radiation at various frequencies. The frequencies of interest for the UAH and RSS models are those at which the atmosphere is opaque. There are issues with this approach. Excessive cloudiness (or the lack of clouds) can confuse the algorithms used to translate observations to temperatures. The instruments that measure the data degrade, and degrade unequally. To counteract this latter effect, radiosondes that do measure temperature are regularly launched to coincide with satellite passes so that the satellite instruments and algorithms can be recalibrated. Finally, while the satellite data do show a recent sharp climb (recent meaning the last six years or so), it's not nearly as steep as the increase observed near the surface by weather stations that actually do use thermometers. [1]: https://i.stack.imgur.com/KT85Z.png [2]: https://i.stack.imgur.com/rzZR5.png [3]: https://i.stack.imgur.com/m161S.png