Microclimate data from Coal Nunatak, Alexander Island, 2006-2019 [Version 2.0]

Microclimate data collected hourly at Coal Nunatak, for 10 climatic variables via automatic data loggers, 2006-2019. Data is not available across the entire temporal range for all variables. NERC funded under the British Antarctic Survey National Capability programme, Polar Science for Planet Earth.

This is an updated version of this dataset. There have been changes to the quality control carried out in the updated data.

Alternate title: Polar Data Centre (PDC) record GB/NERC/BAS/PDC/01598

Date (Publication): 2024-04-23

Citation identifier: http://www.antarctica.ac.uk/dms/metadata.php?id= / GB/NERC/BAS/PDC/01598

Point of contact

Organisation name	Individual name	Electronic mail address	Role
British Antarctic Survey		pdc@bas.ac.uk	Custodian
British Antarctic Survey	Polar Data Centre	pdc@bas.ac.uk	Originator

Maintenance and update frequency: Unknown

Keywords

NDGO0001

NERC OAI Harvesting

NERC_DDC

GCMD Parameter Valids

EARTH SCIENCE > Atmosphere > Atmospheric Temperature > Air Temperature
EARTH SCIENCE > Land Surface > Frozen Ground > Soil Temperature

BAS Free-text keywords

Antarctica
loggers
microclimate
micrometeorological
temperature

Use limitation: This data is governed by the NERC data policy http://www.nerc.ac.uk/research/sites/data/policy/ and supplied under Open Government Licence v.3 http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/.

Access constraints: Other restrictions

Other constraints: This data is governed by the NERC data policy http://www.nerc.ac.uk/research/sites/data/policy/ and supplied under Open Government Licence v.3 http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/.

Language: English

Topic category

Biota
Climatology, meteorology, atmosphere

Begin date: 2006-01-31

End date: 2019-02-13

Reference system identifier: OGP / urn:ogc:def:crs:EPSG::4326

Distribution format

Distributor contact

Organisation name	Individual name	Electronic mail address	Role
Polar Data Centre - British Antarctic Survey		pdc@bas.ac.uk	Distributor

OnLine resource

Protocol	Linkage	Name
http		GET DATA

Hierarchy level: Dataset

Domain consistency

Measure identification: INSPIRE / Conformity_001

Conformance result

Title: INSPIRE Data Specification on unknown theme Guidelines

Date

Explanation: See the referenced specification

Pass: No

Statement: Quality control was carried out on this publication [Version 2.0] of the data. Specifically, we checked the data for outliers on variables which we concluded followed a normal distribution. A z-score calculation was carried out using the following equation:

abs(x_i - mean(x_month)) / stddev(x_month)

where we took the absolute value of the variable [x_i], then subtracted x_i by the mean of x_i values measured in that month [x_month] (using the DATE column), and then divided over the standard deviation of x_i values measured in that same month [stdev_x_month]. Using values only within the same month was to constrain the calculation to a range of values subject to seasonal variation, that would otherwise yield results that could include, for example, temperatures expected during the summer as well as the winter.

These values were then categorised into three groups: z-scores under 3, between 3-6, and above 6. An additional column was then created alongside each parameter denoting whether the z-score for that value was under 3 (denoted as ''1''), between 3 and 6 (denoted as ''2''), or above 6 (denoted as ''3''). This is to give users the option to filter values in the data that have been flagged as potential outliers based on the z-score calculation above.

Due to the harsh conditions in Coal Nunatak, data has not been recorded continually across the period. Missing values, where data was not recorded, are included in the dataset.

The exact locations of sensors within the soil does change over time due to environmental conditions, so depths recorded are a guide.

For columns ''wind speed'' and ''wind direction'', values of 0 may indicate that the sensor was frozen.