FE44/2007 Hydrologinen vuosikirja 2001–2005
– Hydrological Yearbook 2001–2005
Johanna Korhonen (ed.), 2007.
Suomen ympäristö 44/2007, Luonnonvarat, 216 s.
(The Finnish Environment 44/2007, Natural resources, 216 p.)
URN:ISBN 978-952-11-2930-8, ISBN 978-952-11-2930-8 (PDF).
The publication is available also in printed form ISBN 978-952-11-2929-2 (pbk.)
The Hydrological Yearbook 2001–2005 comprises annual treatises on hydrological conditions in Finland as well as tables and diagrams presenting daily or monthly means of hydrological variables during these years. As reference values, the means and extremes of the periods 1961–1990 and 1991–2005 are used. For many sites and variables, the difference between the means of these two periods is considerable, often due to the fact that the 1990s and the early 2000s were warmer than the previous decades. In the tables there is also information about the observation sites.
The tables for each of the hydrological variables are preceded by a description of the methods of observing or computing that variable, as well as notes on the coverage of the monitoring network, and in some cases also a map of stations.
Summaries are presented for the following variables: water level, discharge, runoff from small basins, areal precipitation (not corrected for gauge errors), regional water equivalent of snow, evaporation from the Class A pan, temperature of surface water (during the ice-free season), freeze-up and break-up dates of lakes, ice thickness, snow depth and soil frost depth.
Hydrologist Johanna Korhonen, Finnish Environment Institute, email@example.com