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Geometric Identification and Consistent Estimation of Source Apportionment with Application to Greenland Summit Aerosols
Source apportionment, the attribution of observed multipollutant concentrations to underlying sources, can be cast as a non-negative matrix factorization (NMF) problem. Because NMF is non-unique, source apportionment imposes often unverifiable constraints such as structural sparsity or rotational tu
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