Unexpected Reduction in Megacities' Anthropogenic CO2 Emissions in Lower-middle Reaches of the Yangtze River during Extreme 2022 Heatwave

This dataset provides the daily surface air temperature, dew point temperature, surface pressure, wind, cloud, and precipitation from 2021 to 2022 at 11 stations in 8 megacities over the lower-middle reaches of the Yangtze River.Data format:<br>Field 1: Pos 1-4, Length 4: Observation YearYear of observation, rounded to nearest whole hour<br>Field 2: Pos 6-7, Length 2: Observation MonthMonth of observation, rounded to nearest whole hour<br>Field 3: Pos 9-11, Length 2: Observation DayDay of observation, rounded to nearest whole hour<br>Field 4: Pos 12-13, Length 2: Observation HourHour of observation, rounded to nearest whole hour<br>Field 5: Pos 14-19, Length 6: Air TemperatureThe temperature of the airUNITS: Degrees CelsiusSCALING FACTOR: 10MISSING VALUE: -9999<br>Field 6: Pos 20-24, Length 6: Dew Point TemperatureThe temperature to which a given parcel of air must be cooled at constant pressure and water vapor content in order for saturation to occur.UNITS: Degrees CelsiusSCALING FACTOR: 10MISSING VALUE: -9999<br>Field 7: Pos 26-31, Length 6: Sea Level PressureThe air pressure relative to Mean Sea Level (MSL).UNITS: HectopascalsSCALING FACTOR: 10MISSING VALUE: -9999<br>Field 8: Pos 32-37, Length 6: Wind DirectionThe angle, measured in a clockwise direction, between true north and the direction from which the wind is blowing.UNITS: Angular DegreesSCALING FACTOR: 1MISSING VALUE: -9999*NOTE: Wind direction for calm winds is coded as 0.<br> Field 9: Pos 38-43, Length 6: Wind Speed RateThe rate of horizontal travel of air past a fixed point.UNITS: meters per secondSCALING FACTOR: 10MISSING VALUE: -9999<br>Field 10: Pos 44-49, Length 6: Sky Condition Total Coverage CodeThe code that denotes the fraction of the total celestial dome covered by clouds or other obscuring phenomena.MISSING VALUE: -9999DOMAIN: 0: None, SKC or CLR 1: One okta - 1/10 or less but not zero 2: Two oktas - 2/10 - 3/10, or FEW 3: Three oktas - 4/10 4: Four oktas - 5/10, or SCT 5: Five oktas - 6/10 6: Six oktas - 7/10 - 8/10 7: Seven oktas - 9/10 or more but not 10/10, or BKN 8: Eight oktas - 10/10, or OVC 9: Sky obscured, or cloud amount cannot be estimated10: Partial obscuration11: Thin scattered12: Scattered13: Dark scattered14: Thin broken15: Broken16: Dark broken17: Thin overcast18: Overcast19: Dark overcast<br>Field 11: Pos 50-55, Length 6: Liquid Precipitation Depth Dimension - One Hour DurationThe depth of liquid precipitation that is measured over a one hour accumulation period.UNITS: millimetersSCALING FACTOR: 10MISSING VALUE: -9999*NOTE: Trace precipitation is coded as -1<br>Field 12: Pos 56-61, Length 6: Liquid Precipitation Depth Dimension - Six Hour DurationThe depth of liquid precipitation that is measured over a six hour accumulation period.UNITS: millimetersSCALING FACTOR: 10MISSING VALUE: -9999*NOTE: Trace precipitation is coded as -1<br><br>

本数据集收录长江中下游流域8座特大城市的11个观测站点在2021至2022年期间的逐日地表气温、露点温度、海平面气压、风场、云量及降水观测数据。
数据格式：
字段1：位置1-4，长度4：观测年份。观测时刻已取整至最近整小时。
字段2：位置6-7，长度2：观测月份。观测时刻已取整至最近整小时。
字段3：位置9-11，长度2：观测日期。观测时刻已取整至最近整小时。
字段4：位置12-13，长度2：观测时刻。观测时刻已取整至最近整小时。
字段5：位置14-19，长度6：气温。指空气温度。单位：摄氏度；缩放因子：10；缺失值编码：-9999。
字段6：位置20-24，长度6：露点温度。指在气压与水汽含量恒定的条件下，空气团达到饱和状态所需冷却至的温度。单位：摄氏度；缩放因子：10；缺失值编码：-9999。
字段7：位置26-31，长度6：海平面气压。指相对于平均海平面（MSL）的大气压强。单位：百帕；缩放因子：10；缺失值编码：-9999。
字段8：位置32-37，长度6：风向。指以正北为基准，顺时针旋转至风吹来方向的夹角。单位：角度；缩放因子：1；缺失值编码：-9999。*注：静风的风向编码为0。
字段9：位置38-43，长度6：风速。指空气相对于固定点的水平移动速率。单位：米/秒；缩放因子：10；缺失值编码：-9999。
字段10：位置44-49，长度6：总云量覆盖编码。用于表征天空被云或其他遮蔽物覆盖的比例。缺失值编码：-9999。编码含义如下：
0：无云（SKC或CLR）；1：1八分云量（≤1/10且不为0）；2：2~3八分云量（少云，FEW）；3：4八分云量；4：5八分云量（疏云，SCT）；5：6八分云量；6：7~8八分云量；7：9~<10八分云量（多云，BKN）；8：10八分云量（满天云，OVC）；9：天空遮蔽或无法估算云量；10：部分遮蔽；11：薄散云；12：散云；13：浓散云；14：薄碎云；15：碎云；16：浓碎云；17：薄满天云；18：满天云；19：浓满天云。
字段11：位置50-55，长度6：1小时累计液态降水量。指1小时累积时段内测得的液态降水深度。单位：毫米；缩放因子：10；缺失值编码：-9999。*注：微量降水编码为-1。
字段12：位置56-61，长度6：6小时累计液态降水量。指6小时累积时段内测得的液态降水深度。单位：毫米；缩放因子：10；缺失值编码：-9999。*注：微量降水编码为-1。