| A comprehensive model inter-comparison study investigating the water budget during the BALTEX-PIDCAP period | Meteorology and Atmospheric Physics | 2001 | 215 |
| Sources and chemical composition of atmospheric fine and coarse particles in the Helsinki area | Atmospheric Environment | 2001 | 176 |
| Overview of the international project on biogenic aerosol formation in the boreal forest (BIOFOR) | Tellus, Series B: Chemical and Physical Meteorology | 2001 | 155 |
| Indoor air measurement campaign in Helsinki, Finland 1999 – the effect of outdoor air pollution on indoor air | Atmospheric Environment | 2001 | 123 |
| Annual methane emission from Finnish mires estimated from eddy covariance campaign measurements | Theoretical and Applied Climatology | 2001 | 113 |
| Time derivative of the horizontal geomagnetic field as an activity indicator | Annales Geophysicae | 2001 | 108 |
| Ion balances of size-resolved tropospheric aerosol samples: implications for the acidity and atmospheric processing of aerosols | Atmospheric Environment | 2001 | 101 |
| Chemical composition of aerosol during particle formation events in boreal forest | Tellus, Series B: Chemical and Physical Meteorology | 2001 | 97 |
| Seasonal CO2 balances of a subarctic mire | Journal of Geophysical Research | 2001 | 79 |
| Modelling and Mapping Ozone Deposition in Europe | Water, Air, and Soil Pollution | 2001 | 76 |
| Energy content in the storm time ring current | Journal of Geophysical Research | 2001 | 72 |
| Recordings and occurrence of geomagnetically induced currents in the Finnish natural gas pipeline network | Journal of Applied Geophysics | 2001 | 64 |
| Modelling of space weather effects on pipelines | Journal of Applied Geophysics | 2001 | 61 |
| Urban and rural ultrafine (PM0.1) particles in the Helsinki area | Atmospheric Environment | 2001 | 61 |
| Seasonal variations of net CO2 exchange in European Arctic ecosystems | Theoretical and Applied Climatology | 2001 | 54 |
| Homogeneity adjustments of temperature and precipitation series—Finnish and Nordic data | International Journal of Climatology | 2001 | 54 |
| Evaluation of the CAR-FMI model against measurements near a major road | Atmospheric Environment | 2001 | 53 |
| Test of a simple two-layer parameterisation to simulate the energy balance and temperature of a snow pack | Theoretical and Applied Climatology | 2001 | 49 |
| Water production of comet C/1999 S4 (LINEAR) observed with the SWAN instrument | Science | 2001 | 48 |
| Formation of intense nose structures | Geophysical Research Letters | 2001 | 48 |
| Heavy metal budgets for two headwater forested catchments in background areas of Finland | Environmental Pollution | 2001 | 48 |
| The Baltic Sea Experiment (BALTEX): A European Contribution to the Investigation of the Energy and Water Cycle over a Large Drainage Basin | Bulletin of the American Meteorological Society | 2001 | 47 |
| A semi-empirical model for urban PM10 concentrations, and its evaluation against data from an urban measurement network | Atmospheric Environment | 2001 | 47 |
| Comparison of measured and modelled uv indices for the assessment of health risks | Meteorological Applications | 2001 | 46 |
| Use of atmospheric elemental size distributions in estimating aerosol sources in the Helsinki area | Atmospheric Environment | 2001 | 46 |
