Search Results - "Pyhälahti, Timo"

Marine monitoring in transition: On the verge of technological revolution? by Korpinen, Samuli, Kahlert, Maria, Kuosa, Harri, Mack, Leoni, Meissner, Kristian, Pitkänen, Heikki, Pyhälahti, Timo, Uusitalo, Laura

“…Efforts to renew marine ecosystem monitoring to include advanced technology and cost-effective methods have been repeatedly called for. The current…”
Get full text

A Synthesis of Marine Monitoring Methods With the Potential to Enhance the Status Assessment of the Baltic Sea by Mack, Leoni, Attila, Jenni, Aylagas, Eva, Beermann, Arne, Borja, Angel, Hering, Daniel, Kahlert, Maria, Leese, Florian, Lenz, Robin, Lehtiniemi, Maiju, Liess, Antonia, Lips, Urmas, Mattila, Olli-Pekka, Meissner, Kristian, Pyhälahti, Timo, Setälä, Outi, Strehse, Jennifer S., Uusitalo, Laura, Willstrand Wranne, Anna, Birk, Sebastian

“…A multitude of anthropogenic pressures deteriorate the Baltic Sea, resulting in the need to protect and restore its marine ecosystem. For an efficient…”
Get full text

Detection of water quality using simulated satellite data and semi-empirical algorithms in Finland by Härmä, Pekka, Vepsäläinen, Jenni, Hannonen, Tuula, Pyhälahti, Timo, Kämäri, Juha, Kallio, Kari, Eloheimo, Karri, Koponen, Sampsa

“…The aim of the study was to test the feasibility of the band combination of the TERRA MODIS and ENVISAT MERIS instruments for operational monitoring of lakes…”
Get full text

Water quality classification of lakes using 250-m MODIS data by Koponen, S., Kallio, K., Pulliainen, J., Vepsalainen, J., Pyhalahti, T., Hallikainen, M.

“…The traditional method used in the water quality classification of Finnish lakes includes the collection of water samples from lakes and their analysis in…”
Get full text

Landsat ETM+ Images in the Estimation of Seasonal Lake Water Quality in Boreal River Basins by Kallio, Kari, Attila, Jenni, Härmä, Pekka, Koponen, Sampsa, Pulliainen, Jouni, Hyytiäinen, Ulla-Maija, Pyhälahti, Timo

“…We investigated the use of Landsat ETM+ images in the monitoring of turbidity, colored dissolved organic matter (CDOM), and Secchi disk transparency (ZSD) in…”
Get full text

A case study of airborne and satellite remote sensing of a spring bloom event in the Gulf of Finland by Koponen, Sampsa, Attila, Jenni, Pulliainen, Jouni, Kallio, Kari, Pyhälahti, Timo, Lindfors, Antti, Rasmus, Kai, Hallikainen, Martti

“…The concentrations of chlorophyll- a (chl- a), total suspended solids (TSS) and the absorption coefficient of colored dissolved organic matter ( a CDOM(400))…”
Get full text

Validation of a new measuring system for water turbidity field measurements by Näykki, Teemu, Koponen, Sampsa, Väisänen, Tero, Pyhälahti, Timo, Toivanen, Timo, Leito, Ivo

“…Turbidity is an essential parameter for describing water quality by direct and indirect impacts on fish, invertebrates and aquatic plants. Currently,…”
Get full text

Detection of water quality using simulated satellite data and semi-empirical algorithms in Finland: Lake Water Monitoring in Europe by means of Remote Sensing by HÄRMÄ, Pekka, VEPSÄLÄINEN, Jenni, HANNONEN, Tuula, PYHÄLAHTI, Timo, KÄMÄRI, Juha, KALLIO, Kari, ELOHEIMO, Karri, KOPONEN, Sampsa

Get full text

The Use of Environmental Data in Reliability Assessment of Oil Spill Detection by SAR Imagery by Tahvonen, K., Pyhalahti, T.

Get full text

Detection of oil pollution on sea ice with airborne and spaceborne spectrometer by Praks, J., Eskelinen, M., Pulliainen, J., Pyhalahti, T., Hallikainen, M.

“…In this work we demonstrate the feasibility of imaging spectrometer for the detection of oil spills on sea ice. We show that optical spectrometer images can be…”
Get full text

Advances in combining optical citizen observations on water quality with satellite observations as part of an environmental monitoring system by Pyhalahti, Timo, Toivanen, Timo, Kallio, Kari Y., Jarvinen, Marko, Molinier, Matthieu, Koponen, Sampsa, Kotovirta, Ville, Chengyuan Peng, Anttila, Saku, Laanen, Marnix, Lindholm, Matti

“…Citizen observations, environmental data gathered by volunteers without professional observation capabilities, have been extensively used for Finnish water…”
Get full text

Monitoring of turbid coastal and inland waters by airborne imaging spectrometer AISA by Kutser, T., Hannonen, T., Kallio, K., Koponen, K., Pulliainen, J., Pyhalahti, T., Servomaa, H.

“…Reliable monitoring of the pelagic ecosystem has proved to be problematic because of its high temporal and spatial heterogeneity. Processes like algal blooms…”
Get full text