Zobrazeno 1 - 10
of 23
pro vyhledávání: '"Jaakko Ikonen"'
Autor:
Kari Luojus, Jouni Pulliainen, Matias Takala, Juha Lemmetyinen, Colleen Mortimer, Chris Derksen, Lawrence Mudryk, Mikko Moisander, Mwaba Hiltunen, Tuomo Smolander, Jaakko Ikonen, Juval Cohen, Miia Salminen, Johannes Norberg, Katriina Veijola, Pinja Venäläinen
Publikováno v:
Scientific Data, Vol 8, Iss 1, Pp 1-16 (2021)
Measurement(s) snow • snow mass • snow water equivalent Technology Type(s) satellite imaging Sample Characteristic - Environment cryosphere Sample Characteristic - Location Northern Hemisphere Machine-accessible metadata file describing the repor
Externí odkaz:
https://doaj.org/article/07446af8494c46d3b32cfb4e474fcacc
Publikováno v:
Geosciences, Vol 11, Iss 3, p 130 (2021)
The boreal winter 2019/2020 was very irregular in Europe. While there was very little snow in Central Europe, the opposite was the case in northern Fenno-Scandia, particularly in the Arctic. The snow cover was more persistent here and its rapid melti
Externí odkaz:
https://doaj.org/article/6b26661a01fa4df2b315ec8009c5d80e
Autor:
Jaakko Ikonen, Tuomo Smolander, Kimmo Rautiainen, Juval Cohen, Juha Lemmetyinen, Miia Salminen, Jouni Pulliainen
Publikováno v:
Geosciences, Vol 8, Iss 2, p 51 (2018)
Several previous studies have discussed the challenges in remotely sensed soil moisture retrievals over northern boreal environments. However, very few studies have focused solely on an evaluation of these products specifically over these areas. This
Externí odkaz:
https://doaj.org/article/8ed1e21a075d47f0ab1d192b0546ca27
Autor:
Mwaba Hiltunen, Matias Takala, Chris Derksen, Johannes Norberg, Juha Lemmetyinen, Tuomo Smolander, Kari Luojus, Lawrence Mudryk, Jaakko Ikonen, Jouni Pulliainen, Katriina Veijola, Juval Cohen, Miia Salminen, Pinja Venäläinen, Mikko Moisander, Colleen Mortimer
Publikováno v:
Scientific Data
Scientific Data, Vol 8, Iss 1, Pp 1-16 (2021)
Scientific Data, Vol 8, Iss 1, Pp 1-16 (2021)
We describe the Northern Hemisphere terrestrial snow water equivalent (SWE) time series covering 1979–2018, containing daily, monthly and monthly bias-corrected SWE estimates. The GlobSnow v3.0 SWE dataset combines satellite-based passive microwave
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5bc829ff7679d10402561774e6904da2
https://doi.org/10.1038/s41597-021-00939-2
https://doi.org/10.1038/s41597-021-00939-2
Autor:
Tuomo Smolander, Jouni Pulliainen, Juho Vehviläinen, Juval Cohen, Juha Lemmetyinen, Jaakko Ikonen, Kimmo Rautiainen
Publikováno v:
IEEE Transactions on Geoscience and Remote Sensing. 57:1069-1083
This paper presents a new approach for monitoring soil frost in the northern boreal forest region using co-polarized C-band synthetic aperture radar (SAR) data. Due to the high sensitivity of the C-band signal to vegetation, estimating the soil freez
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d6afcf18ed688cd2d9be1a5c4b2acf27
https://doi.org/10.1109/tgrs.2018.2864635
https://doi.org/10.1109/tgrs.2018.2864635
Autor:
Didier G. Leibovici, Gia Destouni, Jaakko Ikonen, Zahra Kalantari, Juha Lemmetyinen, Shaun Quegan
Publikováno v:
Nordic Perspectives on the Responsible Development of the Arctic: Pathways to Action ISBN: 9783030523237
Forecasting the likely future prevalence of climate sensitive infectous diseases (CSIs) in the Arctic requires prediction of how environmental conditions, both aquatic and on the land, will change under a changing climate, together with knowledge of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::442d9c72bdbeae78af94dbc6f2cd4caf
https://doi.org/10.1007/978-3-030-52324-4_5
https://doi.org/10.1007/978-3-030-52324-4_5
Autor:
Miia Salminen, Chris Derksen, Juha Lemmetyinen, Jaakko Ikonen, Tuomo Smolander, Jouni Pulliainen, Kari Luojus, Matias Takala, Johannes Norberg, Juval Cohen, Lawrence Mudryk
Publikováno v:
Nature
Warming surface temperatures have driven a substantial reduction in the extent and duration of Northern Hemisphere snow cover1–3. These changes in snow cover affect Earth’s climate system via the surface energy budget, and influence freshwater re
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f1ba6432238d7f123d22651edce7a47e
Autor:
Miia Salminen, Kari Luojus, Jaakko Ikonen, Jouni Pulliainen, Kirsikka Heinilä, Sari Metsämäki
Publikováno v:
Remote Sensing of Environment. 212:103-113
We developed a methodology to evaluate quantitative uncertainty characteristics of satellite data retrievals including the contribution of systematic error and statistical error. This is introduced by assessing the total product error of optical, sat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2f7548d69460a1fd8df60dce9349231a
https://doi.org/10.1016/j.rse.2018.04.038
https://doi.org/10.1016/j.rse.2018.04.038
Autor:
Andreas Wiesmann, Julia Boike, Jaakko Ikonen, S. P. Davydov, Anna Davydova, Chris Derksen, Juha Lemmetyinen, Moritz Langer, Kimmo Rautiainen, Tiina Parkkinen, Jouni Pulliainen, Matthias Drusch, Mike Schwank
Publikováno v:
Remote Sensing of Environment, 180, 346-360. Elsevier Inc.
A prototype algorithm for hemispheric scale detection of autumn soil freezing using space-borne L-band passive microwave observations is presented. The methodology is based on earlier empirical and theoretical studies of L-band emission properties of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e682b8588f0122c05c1d751136d4b4fc
https://doi.org/10.1016/j.rse.2016.01.012
https://doi.org/10.1016/j.rse.2016.01.012
Autor:
Tuomo Smolander, Simone Bircher, Kimmo Rautiainen, Juha Lemmetyinen, Juho Vehviläinen, Jaakko Ikonen, Jouni Pulliainen
Publikováno v:
Geoscientific Instrumentation, Methods and Data Systems
Geoscientific Instrumentation, Methods and Data Systems, 2016, 5, pp.95-108. ⟨10.5194/gi-5-95-2016⟩
Geoscientific Instrumentation, Methods and Data Systems, Vol 5, Iss 1, Pp 95-108 (2016)
Geoscientific Instrumentation, Methods and Data Systems, 2016, 5, pp.95-108. ⟨10.5194/gi-5-95-2016⟩
Geoscientific Instrumentation, Methods and Data Systems, Vol 5, Iss 1, Pp 95-108 (2016)
During the last decade there has been considerable development in remote sensing techniques relating to soil moisture retrievals over large areas. Within the framework of the European Space Agency's (ESA) Climate Change Initiative (CCI) a new soil mo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f45cd656a75ffb690639acf4436d9b44
https://doi.org/10.5194/gi-5-95-2016
https://doi.org/10.5194/gi-5-95-2016