Tufa Dinku

Tufa Dinku
Columbia University | CU · International Research Institute for Climate and Society

PhD Civil Engineering/Hydrometerology

About

80
Publications
36,144
Reads
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3,927
Citations
Additional affiliations
September 2005 - present
Lamont - Doherty Earth Observatory Columbia University
Position
  • Research Associate
September 2005 - present
Columbia University
Position
  • Researcher

Publications

Publications (80)
Article
Full-text available
Climate services can contribute to alleviating a range of climate-sensitive development challenges, including those of agricultural production and food security. However, the use of climate data for research and applications in Africa has been scanty, mainly due to poor availability of and access to quality climate data. Weather stations are sparse...
Article
Making agriculture resilient to the trends and shocks of a changing and varying climate requires effective use of climate information. However, in many places around the world, collection of climate data has been seriously inadequate and, even when available, poorly accessible, of inconsistent quality, and divorced from foundational capacity buildi...
Article
Full-text available
High-resolution reliable rainfall datasets are vital for agricultural, hydrological, and weather-related applications. The accuracy of satellite estimates has a significant effect on simulation models in particular crop simulation models, which are highly sensitive to rainfall amounts, distribution, and intensity. In this study, we evaluated five w...
Article
Full-text available
Despite recent and mostly global efforts to promote climate services in developing countries, Africa still faces significant limitations in its institutional infrastructure and capacity to develop, access, and use decision-relevant climate data and information products at multiple levels of governance. The Enhancing National Climate Services (ENACT...
Article
Full-text available
In recent years, there has been increasing demand for high-resolution seasonal climate forecasts at sufficient lead times to allow response planning from users in agriculture, hydrology, disaster risk management, and health, among others. This paper examines the forecasting skill of the North American Mul-ti-model Ensemble (NMME) over Ethiopia duri...
Article
Full-text available
Predictability of Ethiopian Kiremt rainfall (June to September: JJAS) and forecast skill of the European Centre for Medium-Range Weather Forecasts (ECMWF) fifth-generation seasonal forecast system 5 (SEAS5) is explored during 1981–2019. The first empirical orthogonal function of observed rainfall explains 50.6% of the total variability and is chara...
Article
Making climate-sensitive economic sectors resilient to climate trends and shocks, through adaptation to climate change and managing uncertainties associated with climate extremes, will require effective use of climate information to help practitioners make climate-informed decisions. The provision of weather and climate information will depend on t...
Preprint
Full-text available
High-resolution reliable rainfall datasets are vital for agricultural, hydrological, and weather-related applications. The accuracy of satellite estimates has a significant effect on simulation models in particular crop simulation models, which are highly sensitive to rainfall amounts, distribution, and intensity. In this study, we evaluated five w...
Preprint
Full-text available
This manuscript describes the construction and validation of high resolution daily gridded (0.05° × 0.05°) rainfall and maximum and minimum temperature data for Bangladesh: the Enhancing National Climate Services for Bangladesh Meteorological Department (ENACTS-BMD) dataset. The dataset was generated by merging data from weather stations, satellite...
Chapter
Full-text available
Faced with the greatest public health crisis of our time, people must work together and learn from each other to overcome the complex challenges facing our communities, countries, and the world. Climate-related hazards are one of those challenges; they exacerbate already challenging public health conditions and impact not just people, but also the...
Conference Paper
Full-text available
The use of an objective seasonal forecast procedure, defined as a traceable, reproducible, and well-documented set of steps that allows the quantification of forecast quality, are preferred and recommended by the World Meteorological Organization in their recent seasonal forecast guidance. However, National Meteorological Services (NMS) in African...
Conference Paper
Agriculture for food production remains a major contributor to the national economies of many developing countries. Often, these countries are characterized by agricultural landscapes that are heavily or even primarily dependent upon rainfall for crop irrigation and watering pastures for cattle. In the face of climate variability and change, decisi...
Chapter
Agriculture needs to produce more and more food not only to satisfy the current needs, but also to cope with the demand from the increasing population on the planet. However, agriculture today faces multiple challenges. Climate change and variability (extremes) feature at the top of these challenges because agriculture is particularly dependent on...
Conference Paper
Seasonal climate forecasts (SCF) are regularly provided by various national and international organizations in a tercile probability format for the coming season with different lead times. Although SCFs have been operationally released to the public for recent years, its utility in agricultural sector has not been well evaluated. A new project led...
Article
Understanding the dynamics and physics of climate extremes will be a critical challenge for twenty-first-century climate science. Increasing temperatures and saturation vapor pressures may exacerbate heat waves, droughts, and precipitation extremes. Yet our ability to monitor temperature variations is limited and declining. Between 1983 and 2016, t...
Article
Full-text available
We consider the question of what is needed for climate services to support sub-Saharan African farmers' adaptation needs at the scale of the climate challenge. Consistent with an earlier assessment that mutually reinforcing supply-side and demand-side capacity constraints impede the development of effective climate services in Africa, our discussio...
Article
Full-text available
There were a large number of active meteorological stations in Rwanda prior to the mid‐1990s and since around 2010. However, from around the time of the Rwandan genocide in 1994 throughout the late 2000s, the number of active stations was greatly reduced. To address temporal and spatial gaps in meteorological observation in several African nations...
Chapter
Full-text available
Climate data are essential in an array of climate research and applications, that include analyses of climate variability and trends and modelling the impact of climate variability and change on different socioeconomic activities. However, the use of climate data for research and applications in Africa has been scanty because availability of and ac...
Article
Full-text available
Accurate measurement of rainfall is vital to analyze the spatial and temporal patterns of precipitation at various scales. However, the conventional rain gauge observations in many parts of the world such as Ethiopia are sparse and unevenly distributed. An alternative to traditional rain gauge observations could be satellite-based rainfall estimate...
Article
Full-text available
Long and temporally consistent rainfall time series are essential in climate analyses and applications. Rainfall data from station observations are inadequate over many parts of the world due to sparse or non‐existent observation networks, or limited reporting of gauge observations. As a result, satellite rainfall estimates have been used as an alt...
Article
Decision-relevant information on the past climate, recent trends, likely future trajectories, anomalies and associated impacts is a prerequisite for decision-making at different levels. Unfortunately, climate information is often not available or, where it does exist, is inaccessible to those that need it most. The Enhancing National Climate Servic...
Article
Full-text available
Accurate measurement of rainfall is vital to analyze the spatial and temporal patterns of precipitation at various scales. However, the conventional rain gauge observations in many parts of the world such as Ethiopia are sparse and unevenly distributed. An alternative to traditional rain gauge observations could be satellite-based rainfall estimate...
Article
Full-text available
Since 2010, the Roll Back Malaria (RBM) Partnership, including National Malaria Control Programs, donor agencies (e.g., President's Malaria Initiative and Global Fund), and other stakeholders have been evaluating the impact of scaling up malaria control interventions on all-cause under-five mortality in several countries in sub-Saharan Africa. The...
Article
Full-text available
While the effect of climate change on the prevalence of malaria in the highlands of Eastern Africa has been the topic of protracted debate, temperature is widely accepted as a fundamentally important environmental factor constraining its transmission. Air temperatures below approximately 18 °C and 15 °C, respectively, prohibit the development of th...
Chapter
Full-text available
Earth’s environment has direct and dramatic effects on its inhabitants in the realms of health and air quality. The climate, even in an unaltered state, poses great challenges but also presents great opportunity for the mankind to survive and flourish. Anthropogenic factors lead to even greater stress on the global ecosystem and to mankind, particu...
Article
Full-text available
Natural climate variability and long-term changes in rainfall and temperature are expected to have major impact in Africa, where most of the population depends on rain-fed agriculture for their food and livelihood. Reliable climate information will be crucial in efforts to build resilience against the negative impact of climate change and to maximi...
Article
Full-text available
Sound climate risk management requires access to the best available decision-relevant climate information and the ability to use such information effectively. The availability and access of such information and the ability to use it is challenging, particularly throughout rural Africa. A gap analysis published by the International Research Institut...
Article
Climate data are used in a number of applications including climate risk management and adaptation to climate change. However, the availability of climate data, particularly throughout rural Africa, is very limited. Available weather stations are unevenly distributed and mainly located along main roads in cities and towns. This imposes severe limit...
Article
Full-text available
A high level expert panel discussed how climate and health services could best collaborate to improve public health. This was on the agenda of the recent Third International Climate Services Conference, held in Montego Bay, Jamaica, 4-6 December 2013. Issues and challenges concerning a demand led approach to serve the health sector needs, were iden...
Article
Full-text available
An experimental drought monitoring tool has been developed that predicts the vegetation condition (Vegetation Outlook) using a regression tree technique at a monthly time-step during the growing season in Eastern Africa. This prediction tool (VegOut-Ethiopia) is demonstrated for Ethiopia as a case study. VegOut-Ethiopia predicts the standardized va...
Article
Full-text available
While the potential usefulness of climate in health decision-making is increasingly recognized, few countries in Africa have the capability to routinely provide the health community with relevant, accurate and timely information that can readily be integrated into decision-support tools. This stalemate is beginning to change as new high-quality inf...
Article
Different satellite rainfall products are used in different applications over different parts of the world. These products are particularly important over many parts of Africa, where they are used to augment the very sparse rain-gauge network. However, the quality of the different satellite products varies from one product to another and from one c...
Technical Report
Full-text available
Effective management of climate variability and change requires that climate information be used effectively in planning and that climate risk be incorporated routinely into development decisions. In order for this to happen in Africa, the National Meteorological and Hydrological Services (NMHSs) and other climate services providers in the continen...
Article
Full-text available
A dense station network over the Ethiopian highlands is used to perform an extensive validation and inter-comparisons of eleven satellite rainfall products and five gridded gauge products. The satellite products include Global Precipitation Climatology (GPCP), NOAA-CPC Merged Analysis (CMAP), the Tropical Rainfall Measuring Mission (TRMM) products...
Article
La variabilidad del clima y el cambio climático representan un importante desafío para el desarrollo sostenible en África. La actual crisis de hambruna en el Cuerno de África es solo otro recordatorio de cómo las fluctuaciones en el clima pueden destruir vidas y sustentos. Etiopía, uno de los países afectados por la actual sequía, ha sufrido las fl...
Article
Full-text available
This paper evaluates rainfall detection capabilities of seven satellite rainfall estimates over the desert locust recession regions of the world. The region of interest covers the arid and semiarid region from northwestern Africa to northwestern India. The evaluated satellite rainfall products are the African rainfall climatology (ARC), rainfall es...
Article
Full-text available
Seven different satellite rainfall estimates are evaluated at daily and 10-daily time scales and a spatial resolution of 0.25 degrees latitude/longitude. The reference data come from a relatively dense station network of about 600 rain gauges over Colombia. This region of South America has a very complex terrain with mountain ranges that form the n...
Article
The estimation of near surface air temperature (Ta) is useful for a wide range of applications such as agriculture, climate related diseases and climate change studies. Air temperature is commonly obtained from synoptic measurements in weather stations. In Africa, the spatial distribution of weather stations is often limited and the dissemination o...
Chapter
Two satellite rainfall estimation algorithms, CMORPH and TMPA, are evaluated over two mountainous regions at daily accumulation and spatial resolution 0.25°. The evaluated TMPA products are TRMM-3B42 and TRMM-3B42RT. The first of the two validations region is located over the Ethiopian highlands in the Horn of Africa. The second is located over the...
Article
Many infectious and chronic diseases are either directly or indirectly sensitive to the climate. Managing this climate sensitivity more effectively requires new working relationships between the health sector and the providers of climate data and information. In Africa, where communities are particularly vulnerable, Ministries of Health and Nationa...
Article
High‐resolution satellite rainfall products, at daily accumulation and 0.25° spatial resolution, are evaluated using station networks located over two different parts of Africa. The first site is located over Ethiopia with a very complex terrain. The second site, located over Zimbabwe, has a less rugged topography. The evaluated satellite rainfall...
Article
Five gridded monthly precipitation products are evaluated using a gauge network over complex topography in Africa. The global gridded products considered are produced by the Global Precipitation Climatology Center (GPCC), NOAA Climate Prediction Center (NOAA–CPC), and the Climate Research Unit at the University of East Anglia (UEA–CRU). Three diffe...
Article
Full-text available
Seasonal differences in the calibration of overland passive microwave rain retrieval are investigated using Tropical Rainfall Measuring Mission (TRMM) Microwave Imager (TMI) and precipitation radar (PR). Four geographic regions from southern Africa, South Asia, the Amazon basin, and the southeastern United States are selected. Three seasons are com...
Conference Paper
Full-text available
Malaria is the most well known of the climate sensitive diseases. Epidemics of malaria are often triggered by climate anomalies and climate informed early warning systems have been advocated in recognition of this. Africa bears the greatest burden of malaria worldwide and it is estimated that almost 125 million people live in areas prone to malaria...
Conference Paper
Full-text available
This paper discusses Climate and Environmental Services for development for Africa as a component of the ClimDev Program. Despite the growing understanding of the climate and its potential impacts on society, climate information is still not routinely useful in decision making. A mechanism is needed that connects the relevant climate science to dec...
Article
Full-text available
An extensive evaluation of 10 different satellite rainfall products was performed using station network over a complex topography, where elevation varies from below sea level to 4620 m. Evaluation was for two groups of products. The first group had low spatial (2.5°) and temporal (monthly) resolution and included the Global Precipitation Climatolog...
Article
Full-text available
A number of the major human infectious diseases and insect pests that plague the developing world are sensitive to inert-seasonal and inter-decadal changes in environment and climate. Monitoring variations in environmental conditions such as rainfall and vegetation helps decision-makers at Ministries of Health and Ministries of Agriculture to asses...
Article
Full-text available
Good health status is one of the primary aspirations of human social development and, as a consequence, health indicators are key components of the human development indices by which we measure progress toward sustainable development. Certain diseases and ill health are associated with particular environmental and climate conditions. The timeframe...
Conference Paper
Full-text available
A number of the major human infectious diseases (like malaria and dengue) and Desert Locusts that still plague the developing world are sensitive to inter-seasonal and inter-decadal changes in environment and climate. Monitoring variations in environmental conditions such as rainfall and vegetation helps decision-makers at Ministries of Agriculture...
Article
This paper extends the work of Dinku and Anagnostou overland rain retrieval algorithm for use with Special Sensor Microwave Imager (SSM/I) observations. In Dinku and Anagnostou, Tropical Rainfall Measuring Mission (TRMM) precipitation radar (PR) rainfall estimates were used to calibrate TRMM Microwave Imager (TMI) retrieval. Regional differences in...
Article
The precipitation radar (PR) on board the TRMM satellite provides definitive measurements of the 3D structure of precipitation. However, its narrow swath (215km) limits the use of this dataset. On the other hand, TMI and SSM/I provide wider swath coverage (760 km for TMI and 1400 km SSM/I) and higher sampling frequency. Thus, combining the higher a...