Temperature records from near-ground microclimate loggers in the central Swedish forest 2015-2016

Caroline Greiser, Kristoffer Hylander

The dataset contains temperature measurements from 117 microloggers that were installed near the ground across the central Swedish forest. The loggers recorded forest microclimate over 12 months every third hour. Each logger was installed within a population of a number of widespread boreal forest understory species (vascular plants, mosses, liverworts and lichens) along the species’ southern range margin.

Site data with coordinates, forest type, forest density, soil moisture, target species population size etc., are provided along with the field protocols with information about overgrown or destroyed loggers.

The microclimate data of the locations hosting marginal populations were compared with another microclimate logger dataset for the same region, in order to investigate if the populations occur in relatively colder places.

Citation

Caroline Greiser, Kristoffer Hylander (2019) Temperature records from near-ground microclimate loggers in the central Swedish forest 2015-2016. Dataset version 1. Bolin Centre Database. https://doi.org/10.17043/greiser-2019-refugiaclimate-1

References

Greiser, C, Ehrlén, J, Meineri, E, Hylander, K. (2020). Hiding from the climate: Characterizing microrefugia for boreal forest understory species. Global Change Biology, 26, 471⁠ – 483. https://doi.org/10.1111/gcb.14874

Data description

The dataset includes two csv files, two xlsx files and one readme txt file with more detailed metadata:

Refugiaclimate_loggerdata_all.csv: All logger temperature measurements including the double measurements from 2 loggers.

Refugiaclimate_loggerdata_minmax: Daily minimum, maximum and mean temperature values per site.

Refugiaclimate_field_protocols.xlsx: Fieldwork protocols including comments if a logger was overgrown or damaged and with site data on soil moisture and forest type etc.

Refugiaclimate_coordinates.xlsx: Site coordinates.

README.txt: Detailed metadata for each column in each table in the data files.

Comments

The loggers were placed ca 5 cm above ground in an inverted plastic cup that was taped onto a wooden stick in order to protect them from rain and direct sunlight. Loggers were brought out in from June to August 2015, read out in October 2015 (only ca. half of them), April 2016 and September 2016.

The loggers measured temperature three times a day (ca. 00:00, 3:00, 6:00, and so on). At some places and during some periods there were two temperature-only loggers in one cup measuring simultaneausly. The temperature measurements of the two loggers in the same pair were sometimes very different (up to several degrees). When extracting daily minimum and maximum temperatures for each site, we picked the less extreme value from the two loggers. For the daily mean temperature we averaged over both loggers.

Alternative contact person for this dataset: [javascript protected email address], Department of Ecology, Environment and Plant Sciences, Stockholm University.

In Greiser et al. (2019), the microclimate data of the locations hosting marginal populations were compared with another microclimate logger dataset for the same region, in order to investigate if the populations occur in relatively colder places.