Meteorological data for Pitilla Biological Station, Guanacaste, Costa Rica

These meteorological data were collected at Pitilla Bilogical Station, in the Guanacaste Conservation Area, Guanacaste, Costa Rica. The data were collected either manually (\"manual\" in variable name) or by a Campbell automated weather station (\"stn\" in variable name). The manual data was recorded manually each morning at approximately 0900 h with basic instruments. Manual temperature was measured with a battery operated max-min thermometer, and gives the maximum and minimum temperature over the preceding 24 hours. Manual precipitation (rainfall) data was physically collected in a rain gauge over the 24 hours preceding the recording of this data. Automated temperature data was collected by the Campbell station each minute with the MetSENS500-DS-17-PT sensor and communicated with a CR300 wireless data logger. The station outputs calculations of maximum and minimum temperature based on by the temperature data collected each minute from midnight (00:00) to midnight (24:00) on “Date”. The automated precipitation data was calculated from 06:01 the previous day to 06:00 on the day corresponding to “Date”, and utilized an automatically-emptying rain gauge. This rain gauge was found in October 2023 to have been colonized by ants, and the measures leading up to this period would have been affected by this. In general, automatic rain gauges may not be reliable for the amount of rain experienced during some tropical rain storms. We re-calculated the maximum and minimum temperatures to correspond to the same time window as the manual temperature data; specifically, starting the previous day at 09:01 h and ending the day corresponding to “Date” at 09:00 h. This staggering procedure can only be done for temperature, not rainfall, because rainfall is only reported by Campbell for 6 hour blocks. Staggered measures of temperature include \"stag\" in the variable name. All time measures in Central Standard Time (GMT-6). Variable names: \"Date\": yyyy-mm-dd format date of measurement \"AirTemp_max_stag_stn\": maximum air temperature from station, 09:01 previous day-0:900 \"AirTemp_min_stag_stn\" : minimum air temperature from station, 09:01 previous day-0:900 \"Rain_Tot_stn\": precipitation automatically measured by station, unreliable, 06:01 the previous day to 06:00 \"AirTemp_min_raw_stn\": minimum air temperature from station, 00:00 to 24:00 \"AirTemp_max_raw_stn\": maximum air temperature from station, 00:00 to 24:00 \"AirTemp_min_manual\": minimum air temperature measured manually, 09:01 previous day-0:900 \"AirTemp_max_manual\": maximum air temperature measured manually, 09:01 previous day-0:900 \"Rain_Tot_manual\": total precipitation measured manually, 09:01 previous day-0:900

本数据集的气象数据采集于哥斯达黎加瓜纳卡斯特省瓜纳卡斯特保护区内的皮蒂拉生物站（Pitilla Biological Station）。
该数据集的数据采集方式分为人工采集（变量名中含"manual"标识）与坎贝尔（Campbell）自动气象站采集（变量名中含"stn"标识）两种。
人工观测数据于每日清晨约09:00使用基础仪器手动记录。人工气温数据采用电池供电的最高最低温度计进行测量，记录的是前24小时内的最高与最低气温。人工降水（降雨）数据通过雨量筒在本次记录前的24小时内实地收集得到。
自动气温数据由坎贝尔气象站搭载的MetSENS500-DS-17-PT传感器每分钟采集一次，并通过CR300无线数据记录仪进行传输存储。该自动站基于变量"Date"所对应的日期当日00:00至次日00:00每分钟采集的气温数据，计算输出最高与最低气温。
自动降水数据的统计时段为变量"Date"对应日期的前一日06:01至当日06:00，采集设备为自动排空式雨量筒。2023年10月的检查发现该雨量筒内有蚂蚁滋生，此日期之前的自动降水测量数据均受此影响。一般而言，自动雨量筒对于部分热带暴雨的降雨量测量结果并不准确可靠。
为与人工气温数据的统计时段保持一致，我们对自动气温数据进行了重新计算：统计时段调整为前一日09:01至变量"Date"对应当日09:00。该时段对齐处理仅适用于气温数据，不适用于降水数据——因坎贝尔自动站仅提供每6小时为间隔的降水统计结果。变量名中含"stag"标识的气温数据即为经过时段对齐处理后的自动观测气温。
所有时间数据均采用中部标准时间（GMT-6，即格林尼治标准时间减6小时）。
变量说明如下：
1. "Date": 测量日期，格式为yyyy-mm-dd
2. "AirTemp_max_stag_stn": 自动观测最高气温，统计时段为前一日09:01至当日09:00
3. "AirTemp_min_stag_stn": 自动观测最低气温，统计时段为前一日09:01至当日09:00
4. "Rain_Tot_stn": 自动观测总降水量，统计时段为前一日06:01至当日06:00，数据可靠性较低
5. "AirTemp_min_raw_stn": 原始自动观测最低气温，统计时段为当日00:00至次日00:00
6. "AirTemp_max_raw_stn": 原始自动观测最高气温，统计时段为当日00:00至次日00:00
7. "AirTemp_min_manual": 人工观测最低气温，统计时段为前一日09:01至当日09:00
8. "AirTemp_max_manual": 人工观测最高气温，统计时段为前一日09:01至当日09:00
9. "Rain_Tot_manual": 人工观测总降水量，统计时段为前一日09:01至当日09:00