In-canopy air temperature measurements at Hartheim Forest Research Site (DE-Har) from 2020-01-01 to 2020-12-31 [L2]

Quality controlled and gap-filled continuous air temperature data measured inside the forest canopy at Hartheim Forest Research Site (ICOS Associate Ecosystem Site DE-Har, UFR Code: HARTHM, 7.59814ºE, 47.93391ºN, 201 m) using an actively ventillated and shielded psychrometer with a PT100 resistance thermometer based on the design of Frankenberger (1951). The psychrometer is operated 2m above ground level at the base of the 30m measurement tower.

Quality controlled in-canopy air temperature data are available and aggregated at 10min, 30min, hourly, daily, monthly and yearly resolution for the year 2020.

Average, minimum and maximum in-canopy air temperatures are provided on hourly, daily, monthly and annual scales.

Characteristic hours and days are reported on daily, monthly and annual scales (e.g. summer days with T_max > 25ºC, hot days with T_max > 30º, desert days with T_max > 35ºC, tropical nights with T_min > 20°, frost days with T_min < 0ºC and ice days with T_max < 0ºC, all based on 00:00 - 24:00 UTC).

Detailed information on gap-filled data is provided.

Note: All times are provided in UTC, not local time.

For more details read `HARTHM_2020_AirTemperature_MetaData.txt`.

Reference: Frankenberger E. (1951): Untersuchungen über den Vertikalaustausch in den unteren Dekametern der Atmosphäre, Ann. Meteorol. 4, 358–374.

本数据集为哈特海姆森林研究站（ICOS附属生态站点DE-Har，UFR代码：HARTHM，经度7.59814°E，纬度47.93391°N，海拔201米）林冠内部经质量控制且填补数据间隙的连续空气温度观测序列。观测采用基于Frankenberger（1951）设计方案、搭载PT100电阻温度计（PT100 resistance thermometer）的主动通风屏蔽式干湿球温度计（psychrometer），安装于30米观测塔基座处，距地面高度2米。

2020年的林冠内空气温度质控数据已按10分钟、30分钟、小时、日、月、年的时间分辨率完成聚合整理。

数据集同步提供小时、日、月、年尺度下的林冠内空气温度平均值、最小值与最大值。

此外，还按日、月、年尺度统计并报告了特征时段与特征日期，例如基于00:00-24:00协调世界时（Coordinated Universal Time, UTC）定义的：最高气温T_max＞25℃的夏日、T_max＞30℃的酷热日、T_max＞35℃的荒漠日、最低气温T_min＞20℃的热带夜、T_min＜0℃的霜冻日以及T_max＜0℃的结冰日。

关于间隙填补数据的详细信息已在数据集中予以说明。

注意：所有时间均采用协调世界时（UTC），而非当地时间。

更多细节请查阅`HARTHM_2020_AirTemperature_MetaData.txt`文件。

参考文献：Frankenberger E.（1951）：《大气低层十米尺度垂直交换研究》，《气象学年刊（Ann. Meteorol.）》第4卷，358–374页。