L. Tupas

The role of nitrogen fixation in biogeochemical cycling in the subtropical North Pacific Ocean

David M. Karl, Ricardo M. Letelier, L. Tupas et al. · Nature · 1997 · 971 citations · Full text

Biogeochemistry, Engineering, Biogeochemical Cycle +10

Seasonal and interannual variability in primary production and particle flux at Station ALOHA

David M. Karl, James R. Christian, John E. Dore et al. · Deep Sea Research Part II Topical Studies in Oceanography · 1996 · 442 citations

Climatology, Meteorology, Hydrometeorology +10

Microorganisms in the Accreted Ice of Lake Vostok, Antarctica

David M. Karl, D. F. Bird, Karin M. Björkman et al. · Science · 1999 · 363 citations

Experimental determination of the organic carbon flux from open-ocean surface waters

Steven Emerson, Paul D. Quay, David M. Karl et al. · Nature · 1997 · 319 citations

Organic Geochemistry, Carbon Sequestration, Environmental Chemistry +9

Ecosystem changes in the North Pacific subtropical gyre attributed to the 1991–92 El Niño

David M. Karl, Ricardo M. Letelier, Dale V. Hebel et al. · Nature · 1995 · 296 citations

Climatology, Ecosystem Changes, Engineering +6