Arianna Varuolo-Clarke

Graduate Student

Arianna is a Ph.D. candidate at the Lamont-Doherty Earth Observatory of Columbia University in the City of New York. She studies observed and simulated precipitation trends and variability in southeastern South America.  She is co-advised by Jason Smerdon at the Lamont-Doherty Earth Observatory of Columbia University and Park Williams at the University of California, Los Angeles.

Arianna earned her M.S. at the School of Marine and Atmospheric Science at Stony Brook University where she was advised by Kevin Reed. Her M.S. research sought to understand how global climate models simulate the northerly extent of precipitation in the North American monsoon and the role that resolution plays in their ability to do so.

Arianna graduated from Northern Vermont University with a B.S. in Atmospheric Science.



[7] Accepted. Cook, BI, JE Smerdon, ER Cook, AP Williams, KJ Anchukaitis, JS Mankin, K Allen, L Andreu-Hayles, TR Ault, S Belmecheri, S Coats, B Coulthard, B Fosu, P Grierson, D Griffin, DA Herrera, M Ionita, F Lehner, C Leland, K Marvel, MS Morales, V Mishra, J Ngoma, HTT Nguyen, A O’Donnell, J Palmer, MP Rao, M Rodriguez-Caton, R Seager, DW Stahle, S Stevenson, UK Thapa, AM Varuolo-Clarke, EK Wise, 2022: Megadroughts in the Common Era and the Anthropocene. Nat. Rev. Earth Environ.

[6] 2022. Varuolo-Clarke, AM, Williams, AP, Smerdon, JE, Ting, M., Bishop, DA. Influence of the South American low-level jet on the austral summer precipitation trend in southeastern South America. Geophysical Research Letters

[5] 2022. Williams AP, Livneh B, McKinnon KA, Hansen WD, Mankin JS, Cook BI, Smerdon JE, Varuolo-Clarke AM, Bjarke NR, Juang CS, Lettenmaier DP. Growing impact of wildfire on western United States water supply. Proceedings of the National Academy of Sciences USA

[4] 2022. Rodriguez-Caton M, Andreu-Hayles L, Daux V, Vuille M, Varuolo-Clarke AM, Oelkers R, Christie DA, D’Arrigo R, Morales MS, Palat Rao M, Srur AM, Vimeux F, Villalba R. Hydroclimate and ENSO Variability Recorded by Oxygen Isotopes from Tree Rings in the South American Altiplano. Geophysical Research Letters

[3] 2021. Steiger NJ, Smerdon JE, Williams AP, Seager R, Varuolo-Clarke AM. Coupled megadrought risk in North and South America. Nature Geoscience

[2] 2021. Varuolo-Clarke AM, Smerdon JE, Williams AP, Seager R. Gross discrepancies between observed and simulated 20th to 21st-century precipitation trends in Southeastern South America. Journal of Climate, 34, 6441-6457,

[1] 2019. Varuolo-Clarke, AM, Reed K A, Medeiros, B. Characterizing the North American Monsoon in the Community Atmosphere Model: Sensitivity to Resolution and Topography, Journal of Climate