Research

Hadley Circulation Variability and Change

Internally and Externally Forced Interactions Between Tropical Ocean and Hadley Circulation.

Hemisphere-Dependent Impacts of ENSO and Atmospheric Eddies on Hadley Circulation (Read paper)

The interannual variability of the Hadley circulation strength (HCS) has hemisphere-dependent drivers.
The Northern Hemisphere HCS is predominantly driven by eddy-driven internal atmospheric variability, while the the Southern Hemisphere HCS is largely driven by ENSO with secondary influence from eddies.

Distinct Internal Tropical Pacific Sea Surface Temperature Patterns Drive Similar Uncertainty in the Hadley Circulation Trend (Paper Coming Soon!)

Tropical Pacific ocean variability can impact the Southern Hemisphere HCS variability over a multidecadal timescales to contirbute to the historical trend.
Both internally driven tropical Pacific warming and cooling can drive similar SH HCS trends, albeit through distinct spatial patterns and mechanisms.

Hadley Cell Edge Modulates the Role of Ekman Heat Flux in a Future Climate (Read Paper!)

Coupled interactions between the ocean and atmosphere imply that changes in the HC also influence ocean variability.
A projected poleward expansion of the Hadley cell expands the latitude where wind-driven Ekman heat flux opposes turbulent heat-flux driven SST variability.

South Asian Summer Monsoon and Extreme Precipitation

Flood causing extreme monsoon rainfall events in Bangladesh and India.

Climate change quadruples flood-causing extreme monsoon rainfall events in Bangladesh and northeast India (Read Paper!)

Bangladesh and Northeast India are home to some of the most densely populated areas in the world, where annual flash floods cause widespread destruction, resulting in loss of life and economic turmoil.
climate change has quadrupled (e.g., increased four times) the likelihood of monsoon extreme precipitation events in these regions, leading to a significant increase in flash floods.