Zhen Dai

Zhen Dai

Zhen is a PhD student at the Harvard John A. Paulson School of Engineering and Applied Sciences. She currently works on the experimental study of aerosol particle reactivity for geoengineering. She is broadly interested in climate and environmental issues. In the past she has managed clean water projects in Haiti and China. Prior to Harvard, Zhen earned an M.S. from UIUC in electrical engineering, and B.S./B.A. from Cornell University in Materials Science & Engineering and Chemistry.

Zhen Dai, Debra Weisenstein, and David Keith. 1/2018. “Tailoring Meridional and Seasonal Radiative Forcing by Sulfate Aerosol Solar Geoengineering.” Geophysical Research Letters, 45. Publisher's VersionAbstract
We study the possibility of designing solar radiation management schemes to achieve a desired meridional radiative forcing (RF) profile using a two-dimensional chemistry-transport-aerosol model. Varying SO2 or H2SO4 injection latitude, altitude, and season, we compute RF response functions for a broad range of possible injection schemes, finding that linear combinations of these injection cases can roughly achieve RF profiles that have been proposed to accomplish various climate objectives. Globally averaged RF normalized by the sulfur injection rate (the radiative efficacy) is largest for injections at high altitudes, near the equator, and using emission of H2SO4 vapor into an aircraft wake to produce accumulation-mode particles. There is a trade-off between radiative efficacy and control as temporal and spatial control is best achieved with injections at lower altitudes and higher latitudes. These results may inform studies using more realistic models that couple aerosol microphysics, chemistry, and stratospheric dynamics.
Zhen Dai

Zhen Dai

PhD Student, Harvard John A. Paulson School of Engineering and Applied Sciences

Zhen is a PhD student at the Harvard John A. Paulson School of Engineering and Applied Sciences. She currently works on the experimental study of aerosol particle reactivity for geoengineering. She is broadly interested in climate and environmental issues. In the past she has managed clean water projects in Haiti and China. Prior to Harvard, Zhen earned an M.S. from UIUC in electrical engineering, and B.S./B.A. from Cornell University in Materials Science & Engineering and Chemistry.... Read more about Zhen Dai