Domingos Urbano

• PhD Physical Oceanography
• Researcher/Technologist at National Centre for Monitoring and Early Warning of Natural Disasters (CEMADEN)

This working paper describes interdisciplinary approaches and recommendations generated by researchers and practitioners from Natural Hazards Center, University of Colorado-Boulder, and the Brazilian Early Warning and Monitoring Centre of Natural Hazards (Cemaden) for advancing people-centered warning systems. The working paper was the result of vi...

Extreme events affect societies all around the world. A recent example is the submarine volcano Hunga Tonga-Hunga Ha'apai in the South Pacific Ocean, which erupted on January 15, 2022 at approximately 0415 UTC, expelling ash up to 39 kilometers high. Instruments around the world recorded both the initial atmospheric shock wave and the subsequent ts...

Is Brazilian people at risk of Tsunami? What does past data say? What are the probabilistic projections? Davis et al., 2017 through a global-scale probabilistic tsunami hazard assessment (PTHA) method, classified South American Coast as midium to low risk. There is more than a 10% chance of a potentially-damaging tsunami occurring in the next 50 y...

Soil moisture is being monitored over the Brazilian semiarid since 2014 using a network of 595 stations. The network was implemented by Cemaden, the National Center for Monitoring and Early Warning of Natural Disasters, with the objective of monitoring of spatial and temporal patterns of soil water and potential impacts on the region's agriculture...

Soil moisture over the Brazilian semiarid region is presented in different visualizations that highlight spatial, temporal and short-term agricultural risk. The analysis used the Soil Moisture Index (SMI), which is based on a normalization of soil moisture by field capacity and wilting point. The index was used to characterize the actual soil moist...

Uma metodologia para corrigir observações de Radiação de Onda Longa Descendente (OLD) geradas por estações de superfície é apresentada. Consiste na aplicação do método de mínimos quadrados para encontrar coeficientes (ks) específicos de sensores PIR Eppley (EP) e CGR4 Kipp & Zonen (KZ) e reprocessamento das séries temporais. A avaliação da metodolo...

The fugacity of CO2 (fCO2) has been measured underway during three quasi-synoptic cruises in the western tropical Atlantic in March/April 2009 and July/August 2010 in the region 6oS-15oN, 52oW-24oW. The distribution of fCO2 is related to the main features of the ocean circulation. Temperature exerts a dominant control on the distribution of fCO2 in...

The impacts of Amazon deforestation on climate change are investigated through the use of twin numerical experiments with an Atmospheric General Circulation Model (AGCM) with prescribed global sea surface temperature and the same AGCM coupled to an ocean GCM over the global-tropics (CGCM). An ensemble approach is adopted, with ten member ensemble-a...

The western Equatorial Undercurrent (EUC) and North Equatorial Countercurrent (NECC) are investigated at 38°W using contemporaneous subsurface (ADCP) and high-resolution near-surface (drifters + satellite altimeter) velocity measurements, together with hydrographic (CTDO2) data that were collected from 1998 to 2006. The observations reveal an EUC w...

This note presents the Southwestern extension of the original PIRATA array (hereafter referred to as the PIRATA SWE), along with the analysis of its first year-and-half data time series. The PIRATA SWE is composed of three ATLAS buoys between 19°S, 35°W and 8°S, 30°W, along a ground track of Jason altimetry satellite. The three buoys of the PIRATA...

Shipboard PIRATA ADCP and CTD data collected along 38°W from 1999 to 2005 provide seven meridional sections of simultaneous mass and direct velocity fields from the South American coast to 15°N. The Equatorial Undercurrent (EUC) depicts a multiple-core structure in all cruises with two main cores above and below the the 20°C, respectively. High sal...

The North Equatorial Countercurrent (NECC) is investigated at 35°W through a combination of theory, high resolution Ocean General Circulation Model outputs, and observations. Transport from ADCP mea-surements during four WOCE cruises and from 5-year SeaWinds scatterometer wind data (QuikSCAT satellite) were used to support model results. It is foun...

It is commonly mentioned in the literature that the first and second baroclinic modes dominate the vertical structure in the tropical ocean. However, most of these studies refer to either theoretical or numerical modeling. There are no quantitative results that confirm the two internal mode dominance through comparisons with velocity observations i...

RESUMO Dois experimentos utilizando um modelo oceânico de circulação geral com resoluções de1/4 e 1/8 de grau na região tropical do Atlântico foram comparados com observações para avaliar o impacto do aumento de resolução de grade na dinâmica e termodinâmica oceânica tropical. O experimento com 1/4 de grau mostrou campos de velocidade muito suaves...

A Contra-corrente Norte Equatorial (CCNE) na porção oeste do Oceano Atlântico Tropical foi investigada através da utilização de observações diretas de velocidade obtidas de forma simultânea à hidrografia por CTD em toda coluna de água e modelagem numérica. A estrutura dinâmica da CCNE associada à estratificação foi decomposta em modos dinâmicos. Am...