Report summary

For University of California, Irvine Department of Earth System Science in 2015-2026, the graph shows 70 visible PIs and 161 internal PI collaborations. The dominant subject mix is Environmental Science as the leading field (39% of slots across 54 PIs; 54 labels), Global and Planetary Change as the leading subfield (22% of slots across 37 PIs; 37 labels), and Atmospheric and Environmental Gas Dynamics as the leading topic (8% of slots across 15 PIs; 15 labels). That is a healthy pattern, with enough links to reveal several interpretable groups rather than one undifferentiated component. The top weighted PIs are Amir AghaKouchak (45 weighted works; Hydrology and Drought Analysis, Flood Risk Assessment and Management); Steven Allison (42.9 weighted works; Soil Carbon and Nitrogen Dynamics, Microbial Community Ecology and Physiology). The most visible ties are Yannick Peings and Guðrún Magnúsdóttir (34 shared works, weight 24.1). The standout breakdown groups are group 1 with 10 PIs, 11 internal connections, weight 56.8, around Global and Planetary Change, Oceanography, Atmospheric Science, led by Steven Allison, Adam C. Martiny, James T. Randerson; group 2 with 10 PIs, 14 internal connections, weight 78.4, around Atmospheric Science, Oceanography, Pulmonary and Respiratory Medicine, led by Eric Rignot, Mathieu Morlighem, J. Mouginot.