Henry F. Diaz mainly focuses on Climatology, Precipitation, Climate change, Glacier and Climate model. His Climatology study combines topics from a wide range of disciplines, such as Range and Paleoclimatology. His Precipitation research includes elements of Atmospheric circulation, Anomaly and Seasonality. Henry F. Diaz works mostly in the field of Climate change, limiting it down to topics relating to High elevation and, in certain cases, Global change, Environmental resource management, Altitude and Lapse rate. His Climate model study combines topics in areas such as Temperature record and Greenhouse gas. His work on Southern oscillation is typically connected to Periodic oscillation and Event as part of general Sea surface temperature study, connecting several disciplines of science.