Data description:
These data sets contain data from boreal subarctic landscape and its ecosystems and ecotones at Kaamanen, northern Finland (69°8’ N, 27°16’ E; 155 m a.s.l.) measured during 2017 - 2019.

C_fluxes1b_Heiskanen_et_al_2022.csv 
	Includes quality screened, u* filtered and gap-filled eddy covariance flux data and modelled pine bog and string top timeseries utilising eddy covariance and manual flux chamber measurements.
	period start (LWT): time and date, local winter time
	forest GPP [mg CO2 m-2 s-1]: eddy covariance gross primary productivity
	forest ER [mg CO2 m-2 s-1]: eddy covariance ecosystem respiration
	forest J_CO2 [mgCO2 m-2 s-1]: storage flux
	forest NEE [mg CO2 m-2 s-1]: eddy covariance net ecosystem exchange
	fen ER [mg CO2 m-2 s-1]: eddy covariance ecosystem respiration
	fen GPP [mg CO2 m-2 s-1]: eddy covariance gross primary productivity
	fen NEE [mg CO2 m-2 s-1]: eddy covariance net ecosystem exchange
	fen CH4 flux [ug CH4 m-2 s-1]: eddy covariance methane flux
	treed pine bog GPP [mg CO2 m-2 s-1]: modelled gross primary productivity
	treed pine bog ER [mg CO2 m-2 s-1]: modelled ecosystem respiration
	treed pine bog NEE [mg CO2 m-2 s-1]: modelled net ecosystem exchange
	sparsely treed pine bog GPP [mg CO2 m-2 s-1]: modelled gross primary productivity
	sparsely treed pine bog ER [mg CO2 m-2 s-1]: modelled ecosystem respiration
	sparsely treed pine bog NEE [mg CO2 m-2 s-1]: modelled net ecosystem exchange
	landscape GPP [mg CO2 m-2 s-1]: upscaled gross primary productivity
	landscape ER [mg CO2 m-2 s-1]: upscaled ecosystem respiration
	landscape NEE [mg CO2 m-2 s-1]: upscaled net ecosystem exchange
	landscape CH4 flux [ug CH4 m-2 s-1]: upscaled CH4 flux
	string top GPP [mg CO2 m-2 s-1]: fen plant community gross primary productivity
	string top ER [mg CO2 m-2 s-1]: fen plant community ecosystem respiration
	string top NEE [mg CO2 m-2 s-1]: fen plant community net ecosystem exchange

C_fluxes2_Heiskanen_et_al_2022.csv 
	Includes quality screened daily average lake fluxes from mineral and organic sediment lakes. MSlake: mineral sediment lake, OSlake: organic sediment lake.
	mean CO2 flux [gC m-2 d-1]: daily average CO2 flux
	stdev CO2 flux: standard deviation of daily CO2 flux chamber measurements
	n CO2 flux: number of quality screened daily CO2 flux chamber measurements
	mean CH4 flux [gC m-2 d-1]: daily average CH4 flux
	stdev CH4 flux: standard deviation of daily CH4 flux chamber measurements
	n CH4 flux: number of quality screened daily CH4 flux chamber measurements

environmental_data_Heiskanen_et_al_2022.xlsx 
	Includes ancillary meteorological and environmental data.
daily data
	date
	precipitation (mm): daily precipitation sum in mm of water, -1 denotes no precipitation
	snow depth (cm): daily snow depth, -1 denotes no snow
	airT (C): daily average air temperature
	max VPD (hPa): daily maximum vapour pressure deficit
	forest soil moisture (m3/m3): daily average soil moisture measured at 10 cm depth
	mineral sediment lake WTL (cm): daily average lake water table level
	WTL SM, F, TT and ST (cm): daily average water table level at fen microforms String margin, Flark, Trichophorum tussock and String top
	WTL SM, F, TT and ST stdev (cm): standard deviation of daily water table level measurements at fen microforms String margin, Flark, Trichophorum tussock and String top
	forest soil temperature (C): daily average soil temperature at 10 cm depth
	lake water temperature (C): daily average lake water temperature at 10 cm from the bottom
 	fen hummock soil temperature (C): daily average soil temperature at 10 cm depth
 	fen hollow soil temperature (C): daily average soil temperature at 10 cm depth
30min data
	period start (LWT): time and date, local winter time
	PPFD (umol m-2 s-1): photosynthetic photon flux density
	air temperature (C): air temperature
	RH (%): relative humidity
SPEI
	year
	5month SPEI May-Sep: yearly 5 month (May - September) Standardised Precipitation Evapotranspiration Index 
	1month SPEI July: yearly 1 month (July) Standardised Precipitation Evapotranspiration Index 

More info:
lauri.heiskanen@fmi.fi