Zobrazeno 1 - 10
of 129
pro vyhledávání: '"P. Alekseychik"'
Autor:
P. Alekseychik, A. Korrensalo, I. Mammarella, S. Launiainen, E.-S. Tuittila, I. Korpela, T. Vesala
Publikováno v:
Biogeosciences, Vol 18, Pp 4681-4704 (2021)
Pristine boreal mires are known as substantial sinks of carbon dioxide (CO2) and net emitters of methane (CH4). Bogs constitute a major fraction of pristine boreal mires. However, the bog CO2 and CH4 balances are poorly known, having been largely est
Externí odkaz:
https://doaj.org/article/8944175c8eed414ebb36961c3308bcfe
Autor:
K. B. Delwiche, S. H. Knox, A. Malhotra, E. Fluet-Chouinard, G. McNicol, S. Feron, Z. Ouyang, D. Papale, C. Trotta, E. Canfora, Y.-W. Cheah, D. Christianson, Ma. C. R. Alberto, P. Alekseychik, M. Aurela, D. Baldocchi, S. Bansal, D. P. Billesbach, G. Bohrer, R. Bracho, N. Buchmann, D. I. Campbell, G. Celis, J. Chen, W. Chen, H. Chu, H. J. Dalmagro, S. Dengel, A. R. Desai, M. Detto, H. Dolman, E. Eichelmann, E. Euskirchen, D. Famulari, K. Fuchs, M. Goeckede, S. Gogo, M. J. Gondwe, J. P. Goodrich, P. Gottschalk, S. L. Graham, M. Heimann, M. Helbig, C. Helfter, K. S. Hemes, T. Hirano, D. Hollinger, L. Hörtnagl, H. Iwata, A. Jacotot, G. Jurasinski, M. Kang, K. Kasak, J. King, J. Klatt, F. Koebsch, K. W. Krauss, D. Y. F. Lai, A. Lohila, I. Mammarella, L. Belelli Marchesini, G. Manca, J. H. Matthes, T. Maximov, L. Merbold, B. Mitra, T. H. Morin, E. Nemitz, M. B. Nilsson, S. Niu, W. C. Oechel, P. Y. Oikawa, K. Ono, M. Peichl, O. Peltola, M. L. Reba, A. D. Richardson, W. Riley, B. R. K. Runkle, Y. Ryu, T. Sachs, A. Sakabe, C. R. Sanchez, E. A. Schuur, K. V. R. Schäfer, O. Sonnentag, J. P. Sparks, E. Stuart-Haëntjens, C. Sturtevant, R. C. Sullivan, D. J. Szutu, J. E. Thom, M. S. Torn, E.-S. Tuittila, J. Turner, M. Ueyama, A. C. Valach, R. Vargas, A. Varlagin, A. Vazquez-Lule, J. G. Verfaillie, T. Vesala, G. L. Vourlitis, E. J. Ward, C. Wille, G. Wohlfahrt, G. X. Wong, Z. Zhang, D. Zona, L. Windham-Myers, B. Poulter, R. B. Jackson
Publikováno v:
Earth System Science Data, Vol 13, Pp 3607-3689 (2021)
Methane (CH4) emissions from natural landscapes constitute roughly half of global CH4 contributions to the atmosphere, yet large uncertainties remain in the absolute magnitude and the seasonality of emission quantities and drivers. Eddy covariance (E
Externí odkaz:
https://doaj.org/article/1a0b0d8493814f1ab3b2b9bac057e320
Publikováno v:
Atmospheric Measurement Techniques, Vol 14, Pp 3501-3521 (2021)
High-resolution thermal infrared (TIR) imaging is opening up new vistas in biosphere–atmosphere heat exchange studies. The rapidly developing unmanned aerial systems (UASs) and specially designed cameras offer opportunities for TIR survey with incr
Externí odkaz:
https://doaj.org/article/ca099b5e60804a71852842b73a9325d5
Autor:
O. Peltola, T. Vesala, Y. Gao, O. Räty, P. Alekseychik, M. Aurela, B. Chojnicki, A. R. Desai, A. J. Dolman, E. S. Euskirchen, T. Friborg, M. Göckede, M. Helbig, E. Humphreys, R. B. Jackson, G. Jocher, F. Joos, J. Klatt, S. H. Knox, N. Kowalska, L. Kutzbach, S. Lienert, A. Lohila, I. Mammarella, D. F. Nadeau, M. B. Nilsson, W. C. Oechel, M. Peichl, T. Pypker, W. Quinton, J. Rinne, T. Sachs, M. Samson, H. P. Schmid, O. Sonnentag, C. Wille, D. Zona, T. Aalto
Publikováno v:
Earth System Science Data, Vol 11, Pp 1263-1289 (2019)
Natural wetlands constitute the largest and most uncertain source of methane (CH4) to the atmosphere and a large fraction of them are found in the northern latitudes. These emissions are typically estimated using process (“bottom-up”) or inversio
Externí odkaz:
https://doaj.org/article/e9f9e6f46d294268a5568099fe262f7d
Autor:
E. Männistö, A. Korrensalo, P. Alekseychik, I. Mammarella, O. Peltola, T. Vesala, E.-S. Tuittila
Publikováno v:
Biogeosciences, Vol 16, Pp 2409-2421 (2019)
We measured methane ebullition from a patterned boreal bog situated in the Siikaneva wetland complex in southern Finland. Measurements were conducted on water (W) and bare peat surfaces (BP) in three growing seasons (2014–2016) using floating gas t
Externí odkaz:
https://doaj.org/article/e1f509d42c3b426094cc50fa33d4edaf
Autor:
P. Alekseychik, I. Mammarella, A. Lindroth, A. Lohila, M. Aurela, Laurila, V. Kasurinen, M. Lund, J. Rinne, M.B. Nilsson, M. Peichl, K. Minkkinen, N.J. Shurpali, E.-S. Tuittila, P.J. Martikainen, J.-P. Tuovinen, T. Vesala
Publikováno v:
Mires and Peat, Vol 21, Iss 14, Pp 1-26 (2018)
Surface–atmosphere energy exchange is strongly ecosystem-specific. At the same time, as the energy balance constitutes responses of an ecosystem to environmental stressors including precipitation, humidity and solar radiation, it results in feedbac
Externí odkaz:
https://doaj.org/article/ec13944206054cf8a6ba0aaa6644c08c
Autor:
A. Korrensalo, E. Männistö, P. Alekseychik, I. Mammarella, J. Rinne, T. Vesala, E.-S. Tuittila
Publikováno v:
Biogeosciences, Vol 15, Pp 1749-1761 (2018)
We measured methane fluxes of a patterned bog situated in Siikaneva in southern Finland from six different plant community types in three growing seasons (2012–2014) using the static chamber method with chamber exposure of 35 min. A mixed-effect
Externí odkaz:
https://doaj.org/article/01f4f0fc935a42a9b27a4e24585bcba2
Autor:
P. Alekseychik, I. Mammarella, D. Karpov, S. Dengel, I. Terentieva, A. Sabrekov, M. Glagolev, E. Lapshina
Publikováno v:
Atmospheric Chemistry and Physics, Vol 17, Pp 9333-9345 (2017)
Very few studies of ecosystem–atmosphere exchange involving eddy covariance data have been conducted in Siberia, with none in the western Siberian middle taiga. This work provides the first estimates of carbon dioxide (CO2) and energy budgets in
Externí odkaz:
https://doaj.org/article/4af080f1c9864bd7aaab1d27d22f7cb9
Autor:
A. Korrensalo, P. Alekseychik, T. Hájek, J. Rinne, T. Vesala, L. Mehtätalo, I. Mammarella, E.-S. Tuittila
Publikováno v:
Biogeosciences, Vol 14, Iss 2, Pp 257-269 (2017)
In boreal bogs plant species are low in number, but they differ greatly in their growth forms and photosynthetic properties. We assessed how ecosystem carbon (C) sink dynamics were affected by seasonal variations in the photosynthetic rate and leaf a
Externí odkaz:
https://doaj.org/article/49f18afc330942bca01fbe2315e41d11
Autor:
H. K. Lappalainen, I. Bashmakova, P. Alekseychik, A. Borisova, N. Altimir, M. Arshinov, B. Belan, G. Matvienko, P. Konstantinov, S. Chalov, N. Zaitseva, J. Bäck, T. Petäjä, T. Vesala, J. Kurbatova, N. Kasimov, A. Baklanov, V. Melnikov, P. Hari, S. Zilitinkevich, M. Kulmala
Publikováno v:
InterCarto. InterGIS, Vol 23, Iss 1, Pp 143-159 (2017)
Pan-Eurasian Experiment (PEEX) initiative (https://www.atm.helsinki.fi/peex/), initiated in 2012, is an international, multidisciplinary, multiscale program focused on solving interlinked global challenges influencing societies in the Northern Eurasi
Externí odkaz:
https://doaj.org/article/ea5608f760f64112ab643b0df2c0a550