Data for: Multiple-globe thermometer for measuring the air temperature without an aspirated radiation shield

This dataset is the original data of the field experiment conducted in the paper “Multiple-globe thermometer for measuring the air temperature without an aspirated radiation shield” by Maruyama. The dataset includes meteorological data of the weather station in the Yawara rice field, temperature data of the standard thermometer, and temperature data of the developed thermometer. The temperature data of the developed thermometer include temperatures of the five globes with different diameters of 0.25, 0.5, 1, 2 and 4 mm. The diameter of the smallest globe in this experiment slightly deviated from 0.25 mm owing to the hand-processing of thermocouples, and the actual diameter was 0.28 mm. Ten-minute data are average values of the temperature measured every 10 s for 10 min. One-minute data are raw values of the temperature sampled every 1 min. One-hour data are the meteorological data of the weather station. A calculation sample containing exact formula and simple formula for obtaining the air temperature by the five-globe thermometer and three-globe thermometer are also included. Symbols in the dataset denote the following elements.

Tair: Air temperature observed at the weather station (°C)
RH: Relative humidity observed at the weather station (%)
U: Wind speed observed at the weather station (m/s)
Rs: Solar radiation observed at the weather station (W/m2)
STD: Air temperature observed using a standard thermometer (°C)
T1: Temperature of the globe with a 0.25-mm diameter (°C)
T2: Temperature of the globe with a 0.5-mm diameter (°C)
T3: Temperature of the globe with a 1-mm diameter (°C)
T4: Temperature of the globe with a 2-mm diameter (°C)
T5: Temperature of the globe with a 4-mm diameter (°C)
5GT: Air temperature obtained by the five-globe thermometer (°C)
3GT: Air temperature obtained by the three-globe thermometer (°C)
5GTs: Air temperature obtained by the five-globe thermometer using simple formula (°C)
3GTs: Air temperature obtained by the three-globe thermometer using simple formula (°C)

Simple formulas are based on the Eq. (5) in the paper, and the air temperature Ta can be calculated as
Ta = 0.6907 T1 + 0.5279 T2 + 0.2977 T3 - 0.0279 T4 - 0.4884 T5, (for the five-globe thermometer)
Ta = T1 + 0.5 (T3 - T5), (for the three-globe thermometer)

本数据集为Maruyama所著论文《无通风辐射屏蔽的多球温度计（Multiple-globe thermometer）用于空气温度测量》中开展的野外实验的原始数据。
数据集涵盖矢仓（Yawara）稻田气象站的气象观测数据、标准温度计温度数据，以及自研温度计的温度数据。
自研温度计的温度数据包含5个不同直径（分别为0.25、0.5、1、2和4 mm）的球体温数据。本次实验中，因热电偶（thermocouples）手工加工，最小测温球的直径出现轻微偏差，实际直径为0.28 mm。
10分钟分辨率数据为每10秒采集一次温度、连续10分钟的温度平均值；1分钟分辨率数据为每1分钟采样的原始温度值；1小时分辨率数据为气象站的气象观测数据。
数据集还包含利用五球温度计和三球温度计计算空气温度的精确公式与简化公式的计算示例。
数据集内各符号代表的元素如下：
Tair：气象站观测的空气温度（单位：°C）
RH：气象站观测的相对湿度（单位：%）
U：气象站观测的风速（单位：m/s）
Rs：气象站观测的太阳辐射（单位：W/m²）
STD：标准温度计观测的空气温度（单位：°C）
T1：直径0.25 mm的球体温（单位：°C）
T2：直径0.5 mm的球体温（单位：°C）
T3：直径1 mm的球体温（单位：°C）
T4：直径2 mm的球体温（单位：°C）
T5：直径4 mm的球体温（单位：°C）
5GT：五球温度计计算得到的空气温度（单位：°C）
3GT：三球温度计计算得到的空气温度（单位：°C）
5GTs：采用简化公式的五球温度计计算得到的空气温度（单位：°C）
3GTs：采用简化公式的三球温度计计算得到的空气温度（单位：°C）
上述简化公式基于该论文中的式(5)，空气温度Ta可通过如下公式计算：
针对五球温度计：
Ta = 0.6907 T1 + 0.5279 T2 + 0.2977 T3 - 0.0279 T4 - 0.4884 T5
针对三球温度计：
Ta = T1 + 0.5 (T3 - T5)