GeoBasis Zackenberg - Meteorology - M2

M2 is one of six meteorological stations in the Zackenberg and Store Sødal Valley. Data from the station is found under meteorology (wind, temperature and relative humidity, short wave and long wave radiation, as well as NDVI), soil properties (soil moisture and soil heat flux) and snow properties (snow depth).
M2 is located on a south facing slope in side the ZEROCALM-2 grid, in which active layer is monitored. The vegetation underneath the mast is dominated by salix arctica.
Measurements at this station were initiated on the 5th of August 2003.
The meteological data at M2 is recorded every half hour.
Between 2003-2012 data was recorded using a CR10x campbell scientific data logger. In August 2012 this was changed to a CR1000 data logger.
As the station is situated on a southfacing slope (dominating leeward side during winter in Zackenberg), the station has been covered in snow during several winters. E.g. during the winter 2014-15, whereafter the mast was tilted slightly towards the south. The tilt was corrected for on the 5th of August 2015 and we estimate that the tilt resulted in incoming shortwave radiation measurements of ~5 % more compared to earlier years. Unfortunately the tilt cannot be corrected for, as the correct inclination is unknown.
Blank cells are missing values due to snow burial, power problems, broken sensors, data logger change, etc.
Major data fall outs are:
2004: 2004.01.27 - 2004-02-08 and then every day until 2004.02.18 due to low battery voltage.
2005: 2005-01-06 - 2005.05.20 (except for two recordings in february), because the mast was out of level due to the weight of snow.
2006: 2006.02.11 - 2006.02.21 due to low battery voltage.
2008: 2008.02.10 - 2008.02.13 due to burial in snow and again from 2008.02.24 - 2008-05-13. During this burial the mast was compltely broken and all sensors that require the mast to be in level in order to give accurate measurements are missing until a new mast was installed 2008.08.13. Windsensors were also damaged during this burial, replaced in 2009.
2009: 2009.02.08 - 2009.03.24 daily dropouts due to low battery voltage.
2010: 2010-01-28 - 2010.05.29 due to dead internal battery.
2011: Several holes in October, due to batteryproblems, station dies 2011.11.17 due to low battery voltage, starts again 2012.04.14.
2012: 2011.11.17 - 2012.04.14 the station was also completely buried in snow and wind cup anemomter broken. Data from 2012.04.19 - 2012.05.02 is missing due to battery problems. And 2012.08.18 - 2012.08.25 due to data logger change.
2013: 2013.04.27 - 2013.04.30 due to problems with memorycard.
2017: Wind vanes A100R (measuring wind speed and gust) and W200P (wind direction and standard deviation) were exchanged with Young Alpine wind monitor (05103-45 Wind monitor), as well as temperature and relative humidity, April 29th.
2018: 2018-02 - 2018-06: due to snow burial. Meteorology:Meteorology GeoBasis Zackenberg:The GeoBasis monitoring programme focuses on selected abiotic characteristics in order to describe the state of Greenlandic terrestrial environments and their potential feedback effects in a changing climate. Monitored plot data is up-scaled to a landscape level and is used to improve ecosystem models to be able to quantify these feedback mechanisms. The GeoBasis programme provides an active response to recommendations in international assessments such as ACIA and SWIPA; and is continuously being adapted based on AMAP and other international founded recommendations. Furthermore, the GeoBasis programme is directly involved in several international networks and research projects (e.g. the Circumpolar Active Layer Monitoring (CALM) programme, the Nordic Centre of Excellence DEFROST, the Danish Centre of Excellence CENPERM, the EU-projects PAGE21 and INTERACT, and the Arctic Research Centre at Aarhus University). The GeoBasis programme is divided into a number of sub-groups, including:

M2是Zackenberg与Store Sødal谷六个气象站之一。该站观测数据涵盖气象学范畴（风速、气温、相对湿度、短波与长波辐射，以及归一化差分植被指数（Normalized Difference Vegetation Index, NDVI））、土壤属性（土壤湿度与土壤热通量）及积雪属性（雪深）。
M2坐落于ZEROCALM-2网格内的南向坡地，该网格同步开展活动层监测工作。铁塔下方的原生植被以北极柳（Salix arctica）为优势种。
该站的观测工作始于2003年8月5日。
M2的气象数据每半小时自动记录一次。
2003年至2012年间，数据采用CR10X型坎贝尔科学（Campbell Scientific）数据采集器存储记录；2012年8月起，更换为CR1000型数据采集器。
由于该站地处南向坡地（冬季为Zackenberg地区的主要背风侧），多个冬季均出现积雪完全掩埋站点的情况。例如2014-2015年冬季过后，铁塔出现向南轻微倾斜的情况。2015年8月5日完成了倾斜校正，经估算，此次倾斜导致入射短波辐射的观测值较往年偏高约5%。遗憾的是，由于无法获知铁塔的原始倾角，该观测误差无法完全修正。
表格中的空白单元格代表因积雪掩埋、供电故障、传感器损坏、数据采集器更换等原因导致的缺失值。
主要的数据中断时段如下：
2004年：2004年1月27日至2月8日，以及2月18日前的每日数据均因电池电压过低缺失。
2005年：2005年1月6日至5月20日（2月仅留存两次有效记录），因积雪重压导致铁塔失准。
2006年：2006年2月11日至2月21日，因电池电压过低导致数据中断。
2008年：2008年2月10日至2月13日因积雪掩埋出现数据中断，2月24日至5月13日再次发生数据丢失。此次掩埋事件中，铁塔完全损坏，所有需保持铁塔水平才能实现精准测量的传感器数据均缺失，直至2008年8月13日更换新铁塔后方恢复观测。风速传感器亦在此次掩埋中受损，于2009年完成更换。
2009年：2009年2月8日至3月24日的每日数据均因电池电压过低中断。
2010年：2010年1月28日至5月29日因内置电池耗尽缺失。
2011年：10月出现多次数据中断，系电池故障所致；站点于2011年11月17日因电池电压过低停机，2012年4月14日恢复运行。
2012年：2011年11月17日至2012年4月14日期间，站点完全被积雪掩埋，杯式风速传感器损坏。2012年4月19日至5月2日因电池问题缺失数据，8月18日至8月25日因更换数据采集器导致数据中断。
2013年：2013年4月27日至4月30日因存储卡故障缺失数据。
2017年：4月29日，风速与阵风监测传感器A100R、风向及标准差监测传感器W200P被更换为Young Alpine型风速监测仪（05103-45 Wind monitor），同时更换了气温与相对湿度传感器。
2018年：2018年2月至6月因积雪掩埋导致数据中断。
格陵兰Zackenberg地区气象基础监测计划（GeoBasis Zackenberg）：该监测计划聚焦选定的非生物特征，旨在描述格陵兰陆地生态系统的状态及其在气候变化背景下的潜在反馈效应。监测样地数据被向上尺度推演至景观尺度，用于优化生态系统模型以量化此类反馈机制。本计划积极响应ACIA、SWIPA等国际评估报告中的建议，并基于北极监测与评估计划（Arctic Monitoring and Assessment Programme, AMAP）及其他国际倡议持续调整完善。此外，格陵兰气象基础监测计划深度参与多个国际网络与研究项目，例如环北极活动层监测（Circumpolar Active Layer Monitoring, CALM）计划、北欧卓越中心DEFROST、丹麦卓越中心CENPERM、欧盟项目PAGE21与INTERACT，以及奥胡斯大学北极研究中心。该监测计划下设多个子工作组，包括：