Sources and source variations for aerosol at Mace Head, Ireland

Positive matrix factorization: A non‐negative factor model with optimal utilization of error estimates of data values

Pentti Paatero, Unto Tapper · Environmetrics · 1994 · 6.3K citations

Computing, Data Science, Data Analytics +14

Oceanic phytoplankton, atmospheric sulphur, cloud albedo and climate

Robert J. Charlson, J. E. Lovelock, Meinrat O. Andreae et al. · Nature · 1987 · 4.4K citations

Natural Sciences, Earth Sciences, Oceanography +16

Least squares formulation of robust non-negative factor analysis

Pentti Paatero · Chemometrics and Intelligent Laboratory Systems · 1997 · 2.1K citations

Natural Sciences, Mathematics, Statistical Modeling +8

Global inventory of natural and anthropogenic emissions of trace metals to the atmosphere

Jerome O. Nriagu · Nature · 1979 · 820 citations

Natural Sciences, Earth Sciences, Environmental Sciences +16

Analysis of different modes of factor analysis as least squares fit problems

Pentti Paatero, Unto Tapper · Chemometrics and Intelligent Laboratory Systems · 1993 · 485 citations

Social Sciences, Psychology, Item Response Theory +15