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_fluxes1_Heiskanen_et_al_2022.csv 
	Includes quality screened, u* filtered and gap-filled eddy covariance flux data, temporally and area weighted average lake chamber fluxes 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
	lake CO2 flux [mg CO2 m-2 s-1]: averaged lake CO2 flux
	lake CH4 flux [ug CH4 m-2 s-1]: averaged lake CH4 flux
	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