A5080483433- Climate variability and models
- Tropical and Extratropical Cyclones Research
- Meteorological Phenomena and Simulations
- Atmospheric chemistry and aerosols
- Ocean Waves and Remote Sensing
- Oceanographic and Atmospheric Processes
- Atmospheric Ozone and Climate
- Atmospheric and Environmental Gas Dynamics
- Air Quality and Health Impacts
- Atmospheric aerosols and clouds
- Vehicle emissions and performance
- Paleontology and Stratigraphy of Fossils
- Hydrology and Drought Analysis
- Air Quality Monitoring and Forecasting
- Urban Heat Island Mitigation
- Plant Water Relations and Carbon Dynamics
- Geological and Geophysical Studies
- Precipitation Measurement and Analysis
- Impact of Light on Environment and Health
Universidad Nacional Autónoma de México
2018-2024
Lamont-Doherty Earth Observatory
2023-2024
Columbia University
2023-2024
University of Oxford
2019-2023
Science Oxford
2021
University of Leeds
2020
NOAA Oceanic and Atmospheric Research
2020
Abstract. This study examines Quasi-Biennial Oscillation (QBO) teleconnections and their modulation by the El Niño-Southern (ENSO), using a multi-model ensemble of Atmospheric Processes And Role in Climate (APARC) QBO initiative (QBOi) models. Some difficulties arise examining observed QBO-ENSO from distinguishing ENSO influences outside region, due to aliasing between over historical record. To separate signals, simulations are conducted with annually-repeating prescribed sea-surface...
Abstract Observations show that the seasonal cycle of precipitation in parts southern Mexico and Central America exhibits a bimodal signal, known as Midsummer drought (MSD), but there is no consensus on which processes are most relevant for two-peak structure rainy season. This paper evaluates three hypotheses could explain MSD: SST cloud-radiative feedback, solar declination angle Caribbean Low-Level Jet (CLLJ) moisture transport hypotheses. Model experiments produced by Met Office Hadley...
Hurricane Otis became the strongest hurricane ever recorded at landfall in Eastern North Pacific Basin. The region of Acapulco, Mexico, a harbour with over 1 million inhabitants was not prepared for winds that reached gust speeds 329kmh−1 by an situ sensor. This study describes rapid intensification and using blend satellite imagery, reanalysis station data. Tropical Storm formed on 22 October 2023 several hundred kilometres off western coast Mexico. Only 72h later, made as Mexican coast....
Abstract This study evaluates the representation of tropical cyclone precipitation (TCP) in reforecasts from Subseasonal to Seasonal (S2S) Prediction Project. The global distribution S2S models shows relevant biases multimodel mean ensemble that are characterized by wet total and TCP, except for Atlantic. TCP can contribute more than 50% basins such as southern Indian Ocean South Pacific. magnitude spatial pattern these exhibit little variation with lead time. origins be attributed frequency...
A global tropical cyclone precipitation dataset covering the period from January 1979 to February 2023 is presented. Global estimates were taken newly developed high-resolution Multi-Source Weighted-Ensemble Precipitation, version 2 (MSWEP V2) and TC tracks obtained International Best Track Archive for Climate Stewardship (IBTrACS) dataset. This Tropical Cyclone Precipitation (MSTCP) comprised of two main products files in format tables: profile datasets. The file provides various TCP...
Abstract. The simulated climate of the American monsoon system (AMS) in UK models HadGEM3 GC3.1 (GC3) and Earth model UKESM1 is assessed compared to observations reanalysis. We evaluate pre-industrial control, AMIP historical experiments two configurations GC3: a low (1.875∘×1.25∘) medium (0.83∘×0.56∘) resolution. simulations show good representation seasonal cycle temperature regions, although overestimate observed summer Amazon, Mexico Central America by more than 1.5 K. rainfall general...
Abstract. The influence of the quasi-biennial oscillation (QBO) on tropical climate is demonstrated using 500-year pre-industrial control simulations from Met Office Hadley Centre model. Robust precipitation responses to phase QBO are diagnosed in model, which show zonally asymmetric patterns that resemble El Niño–Southern Oscillation (ENSO) impacts. These found because frequency ENSO events for each significantly different these simulations, with more Niño under westerly (QBOW) and La Niña...
Abstract A new method to determine monsoon onset and retreat timings using wavelet transform methodology applied precipitation time‐series at the pentad scale is described. The principal advantage of this its portability, since it can be easily adapted for any region dataset. application illustrated North American Monsoon Indian four different datasets climate model output. shown robust across all both regions. mean dates agree well with previous methods. Spatial distributions circulation...
Abstract The impact of the quasi‐biennial oscillation (QBO) on tropical convection and precipitation is investigated through nudging experiments using UK Met Office Hadley Center Unified Model. model control simulations show robust links between internally generated QBO circulation. zonal wind in stratosphere was nudged above 90 hPa atmosphere‐only coupled ocean‐atmosphere configurations. do not differ with without nudging, which may indicate that SST‐convection coupling needed for any...
Abstract Precipitation often happens along organized filaments or bands of moisture such as convergence zones. Recent regional studies have shown that these arise from synoptic-scale mixing features known attracting Lagrangian coherent structures (LCSs). In this study, we present a climatology and investigate its covariability with precipitation on temporal scales ranging weekly to interannual. We characterize the finite-time Lyapunov exponent (FTLE), measure parcel deformation, in ERA5 data...
Abstract This paper analyzes the climatology, prediction skill, and predictability of tropical cyclones (TCs) in NASA’s Goddard Earth Observing System Subseasonal to Seasonal (GEOS-S2S) forecast system version 2. GEOS reasonably simulates number spatial distribution TCs compared observations except Atlantic where model too few due low genesis rates Caribbean Sea Gulf Mexico. The environmental conditions, diagnosed through a potential index, do not clearly explain biases rates, especially...
Abstract This study diagnoses the degree of gradient wind balance (GWB) in dropsonde observations 30 tropical cyclones (TCs) divided into 91 intense observation periods. The diagnosed GWB these periods are composited to investigate which characteristics a TC significantly related departures from GWB. analysis confirms that on average flow above boundary layer is approximately Supergradient more common near radius maximum (RMW) upper than free troposphere or outside RMW and also strong storms...
Abstract. The simulated climate in the American Monsoon System (AMS) CMIP6 submissions of HadGEM3.0 GC3.1 and UKESM1 is assessed compared to observations reanalysis. Pre-industrial control historical experiments are analysed evaluate model representation this monsoon under different configurations, resolutions with without Earth processes. simulations exhibit a good temperature precipitation seasonal cycles, although overestimate summer Amazon, Mexico Central America by more than 1.5 K....
This study evaluates the main hypotheses to explain a coupling between quasi-biennial oscillation (QBO) in tropical stratosphere and troposphere surface. The impact of QBO on convection precipitation is investigated through nudging experiments using UK Met Office Hadley Centre Unified Model (UM). model control simulations show robust links internally generated circulation. zonal wind was nudged above 90 hPa atmosphere-only coupled ocean-atmosphere configurations. simulation not statistically...
Abstract. Tropical cyclone precipitation (TCP) has significant impacts on coastal communities through its modulation of flood event frequency as well the water supply in many regions world. Satellite estimates provide our most reliable observations TCP available globally, however, satellite were limited because products only have coverage starting 1997. In this paper, we present a global dataset using newly developed high-resolution Multi-Source Weighted-Ensemble Precipitation, version 2...
<p>The American Monsoon System is the main source of rainfall for tropical and sub-tropical Americas. CMIP6 climate model simulations from MetOffice Hadley Centre (MOHC) models: HadGEMGC3.1 Earth UKESM1 were analyzed to evaluate representation this monsoon. Pre-industrial historical experiments compared reanalyses observations.  Several diagnostics, such as Inter-tropical Convergence Zone (ITCZ) location, Walker circulation temperature precipitation seasonal cycles...