Zobrazeno 1 - 10
of 17
pro vyhledávání: '"Timo Pyhälahti"'
Autor:
Samuli Korpinen, Maria Kahlert, Harri Kuosa, Leoni Mack, Kristian Meissner, Heikki Pitkänen, Timo Pyhälahti, Laura Uusitalo
Publikováno v:
Frontiers in Marine Science, Vol 9 (2022)
Efforts to renew marine ecosystem monitoring to include advanced technology and cost-effective methods have been repeatedly called for. The current environmental legislation in European Union (EU) requires also ecosystem monitoring beyond the scope o
Externí odkaz:
https://doaj.org/article/53b50dca88b44252a05cefaaa0189fdc
Autor:
Leoni Mack, Jenni Attila, Eva Aylagas, Arne Beermann, Angel Borja, Daniel Hering, Maria Kahlert, Florian Leese, Robin Lenz, Maiju Lehtiniemi, Antonia Liess, Urmas Lips, Olli-Pekka Mattila, Kristian Meissner, Timo Pyhälahti, Outi Setälä, Jennifer S. Strehse, Laura Uusitalo, Anna Willstrand Wranne, Sebastian Birk
Publikováno v:
Frontiers in Marine Science, Vol 7 (2020)
A multitude of anthropogenic pressures deteriorate the Baltic Sea, resulting in the need to protect and restore its marine ecosystem. For an efficient conservation, comprehensive monitoring and assessment of all ecosystem elements is of fundamental i
Externí odkaz:
https://doaj.org/article/02e0f6b3bc924cd394babe034410c8e1
Publikováno v:
Remote Sensing of Environment. 157:147-157
We evaluated MERIS spectral inversion processors in the estimation of chlorophyll a (Chl-a), total suspended matter (TSM), absorption of colored dissolved organic matter (a CDOM at 443 nm) and Secchi disk transparency (Z SD ) in four lakes located in
Publikováno v:
Näykki, T, Koponen, S, Väisänen, T, Pyhälahti, T, Toivanen, T & Leito, I 2014, ' Validation of a new measuring system for water turbidity field measurements ', Accreditation and Quality Assurance, vol. 19, no. 3, pp. 175-183 . https://doi.org/10.1007/s00769-014-1052-9
Turbidity is an essential parameter for describing water quality by direct and indirect impacts on fish, invertebrates and aquatic plants. Currently, environmental monitoring measurements are carried out with appropriate quality by accredited testing
Autor:
I. Heiler, S. Korhonen, K. Tahvonen, M. Simila, Timo Pyhälahti, Jouni Pulliainen, J.-P. Karna, H. Alasalmi, S. Neuvonen, Y. Laine, J. Karvonen, H. Haapasaari
An automated processing system for SAR (synthetic aperture radar) data and a web user interface for browsing oil spill related cartographic information have been developed to assist oil combating operations. Baltic Oil Response Information System (BO
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2d11b9bee67706c643f3426b09daeb3a
http://juuli.fi/Record/0284115616
http://juuli.fi/Record/0284115616
Autor:
Timo Toivanen, Kari Kallio, Matti Lindholm, Matthieu Molinier, Timo Pyhälahti, Sampsa Koponen, Chengyuan Peng, Ville Kotovirta, Saku Anttila, Marnix Laanen, Marko Järvinen
Publikováno v:
Pyhälahti, T, Toivanen, T, Kallio, K, Järvinen, M, Molinier, M, Koponen, S, Kotovirta, V, Peng, C Y, Anttila, S, Laanen, M & Lindholm, M 2015, Advances in combining optical citizen observations on water quality with satellite observations as part of an environmental monitoring system . in 2015 IEEE International Geoscience and Remote Sensing Symposium (IGARSS) . IEEE Institute of Electrical and Electronic Engineers, pp. 5395-5398, IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2015, Milano, Italy, 26/07/15 . https://doi.org/10.1109/IGARSS.2015.7327055
IGARSS
IGARSS
Citizen observations, environmental data gathered by volunteers without professional observation capabilities, have been extensively used for Finnish water quality monitoring tasks. Recently, mobile smartphones and their digital cameras have enabled
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c6abec7ced2a26bf436afcec633eb8c2
https://cris.vtt.fi/en/publications/b2d3b558-dd44-48a9-9376-b11c5fcb30f8
https://cris.vtt.fi/en/publications/b2d3b558-dd44-48a9-9376-b11c5fcb30f8
Autor:
Pekka Härmä, Kari Kallio, Sampsa Koponen, Ulla-Maija Hyytiäinen, Timo Pyhälahti, Jenni Attila, Jouni Pulliainen
Publikováno v:
Environmental Management. 42:511-522
We investigated the use of Landsat ETM+ images in the monitoring of turbidity, colored dissolved organic matter (CDOM), and Secchi disk transparency (Z(SD)) in lakes of two river basins located in southern Finland. The ETM+ images were acquired in Ma
Autor:
Kari Kallio, Timo Pyhälahti, Jouni Pulliainen, T. Hannonen, Karri Eloheimo, Pekka Härmä, Sampsa Koponen, Jenni Attila
Publikováno v:
Photogrammetric Engineering & Remote Sensing. 74:363-374
The effects of an atmospheric correction method for water quality estimation have been studied and validated for Airborne Imaging Spectrometer for Applications (AISA) data. This novel approach uses atmospheric input parameters from a numerical weathe
Autor:
Jari P. Kaipio, Kari Kallio, Arto Voutilainen, Heikki Haario, Jouni Pulliainen, Timo Pyhälahti
Publikováno v:
International Journal of Applied Earth Observation and Geoinformation. 9:50-64
In this paper we consider the estimation of lake water quality constituent distributions from hyperspectral remote sensing data. We present a computational approach that can be used to assimilate information from mathematical evolution models into da
A case study of airborne and satellite remote sensing of a spring bloom event in the Gulf of Finland
Autor:
Kari Kallio, Timo Pyhälahti, Martti Hallikainen, Antti Lindfors, Jenni Attila, Sampsa Koponen, Jouni Pulliainen, Kai Rasmus
Publikováno v:
Continental Shelf Research. 27:228-244
The concentrations of chlorophyll- a (chl- a ), total suspended solids (TSS) and the absorption coefficient of colored dissolved organic matter ( a CDOM (400)) are estimated in Case II waters using medium resolution imaging spectrometer (MERIS) satel