Hydroclimate Varability of the Greater Horn of Africa Climate PDF Download
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Author: Vincent Owanda Otieno
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Author: Vincent Owanda Otieno
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Author: Joseph Awange
Publisher: Springer Nature
ISBN: 3030910024
Category : Science
Languages : en
Pages : 431
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Book Description
This book will benefit users in food security, agriculture, water management, and environmental sectors. It provides the first comprehensive analysis of Greater Horn of Africa (GHA)’s food insecurity and hydroclimate using the state-of-the-art Gravity Recovery and Climate Experiment (GRACE) and its Follow-on (GRACE-FO)’s, centennial precipitation, hydrological models’ and reanalysis’ products. It is here opined that GHA is endowed with freshwater (surface and groundwater) being home to the world's second largest freshwater body (Lake Victoria) and the greatest continental water towers (Ethiopian Highlands) that if properly tapped in a sustainable way, will support its irrigated agriculture as well as pastoralism. First, however, the obsolete Nile treaties that hamper the use of Lake Victoria (White Nile) and Ethiopian Highland (Blue Nile) have to be unlocked. Moreover, GHA is bedevilled by poor governance and the ``donor-assistance” syndrome; and in 2020-2021 faced the so-called ``triple threats’’ of desert locust infestation, climate variability/change impacts and COVID-19 pandemic. Besides, climate extremes influence its meagre waters leading to perennial food insecurity. Coupled with frequent regional and local conflicts, high population growth rate, low crop yield, invasion of migratory pests, contagious human and livestock diseases (such as HIV/AIDs, COVID-19 & Rift Valley fever) and poverty, life for more than 310 million of its inhabitants simply becomes unbearable. Alarming also is the fact that drought-like humanitarian crises are increasing in GHA despite recent progress in its monitoring and prediction efforts. Notwithstanding these efforts, there remain challenges stemming from uncertainty in its prediction, and the inflexibility and limited buffering capacity of the recurrent impacted systems. To achieve greater food security, therefore, in addition to boosting GHA's agricultural output, UN Office for the Coordination of Humanitarian Affairs suggest that its “inhabitants must create more diverse and stable means of livelihood to insulate themselves and their households from external shocks”. This is a task that they acknowledge will not be easy as the path ahead is “strewn with obstacles namely; natural hazards and armed conflicts”. Understanding GHA’s food insecurity and its hydroclimate as presented in this book is a good starting point towards managing the impacts of the natural hazards on the one hand while understanding the impacts associated with extreme climate on GHA's available water and assessing the potential of its surface and groundwater to support its irrigated agriculture and pastoralism would be the first step towards “coping with drought” on the other hand. The book represents a significant effort by Prof Awange in trying to offer a comprehensive overview of the hydroclimate in the Greater Horn of Africa (GHA). Prof Eric F. Wood, NAE (USA); FRSC (Canada); Foreign member, ATSE (Australia).
Author: Jared Heath Bowden
Publisher:
ISBN:
Category :
Languages : en
Pages : 195
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Book Description
Keywords: EOF, ENSO, Parallel Climate Model, Decadal Trend.
Author: Sarah Boulter
Publisher: Cambridge University Press
ISBN: 1107511984
Category : Science
Languages : en
Pages : 289
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Book Description
This volume presents eighteen case studies of natural disasters from Australia, Europe, North America and developing countries. By comparing the impacts, it seeks to identify what moves people to adapt, which adaptive activities succeed and which fail, and the underlying reasons, and the factors that determine when adaptation is required and when simply bearing the impact may be the more appropriate response. Much has been written about the theory of adaptation and high-level, especially international, policy responses to climate change. This book aims to inform actual adaptation practice - what works, what does not, and why. It explores some of the lessons we can learn from past disasters and the adaptation that takes place after the event in preparation for the next. This volume will be especially useful for researchers and decision makers in policy and government concerned with climate change adaptation, emergency management, disaster risk reduction, environmental policy and planning.
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Languages : en
Pages :
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The objective of this study is to investigate the recent climate variability on intra-seasonal, interannual, and decadal time scales for the Greater Horn of Africa for the seasons of October, November, December (OND) and March, April, May (MAM). We use Empirical Orthogonal Functions (EOFs) to separate the variability. The observed climate variability is used to characterize the historical Parallel Climate Model variability. We then investigate the projected climate variability from the Parallel Climate Model business-as-usual run. Specifically, we demonstrate the observed rainfall-circulation relationships for ENSO during the OND and MAM seasons in relation to the rainfall over GHA using EOFs and the weighted wind composites. We find that during the recent climate of the OND season ENSO and the Indian Ocean Zonal Mode (IOZM) occur simultaneously with strong anticyclonic flow near Sumatra. As for the MAM season, there is no sign of the IOZM. During the OND season, the historical EOFs separate ENSO and the IOZM, suggesting the two can behave independently. Overall, the GHA region experiences positive anomalous rainfall during the OND season with the positive phase of the IOZM. The MAM season has no IOZM and demonstrates a complicated spatial temporal pattern because ENSO is in a transition phase during this season. We also demonstrate the significance of a trend mode for both OND and MAM seasons. The trend of the OND season is highly correlated to the tropical South Atlantic Index. The trend is seen in all months but strongest during October. The MAM characteristically favors the tropical South Atlantic Index, but the correlations are much lower. Overall, the combined affect of the MAM and OND season would generate an increasingly wetter northwest GHA and drier southern GHA. Somalia is the only region that compensates the increasing trend through an opposite loading relationship between the OND and MAM seasons.
Author: Jared Heath Bowden
Publisher:
ISBN:
Category :
Languages : en
Pages : 312
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Book Description
Keywords: climate change, regional climate modeling, empirical analysis, Greater Horn of Africa.
Author:
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Category :
Languages : en
Pages :
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There has been limited regional climate modeling (RCM) studies of climate change over the Greater Horn of Africa because of challenges of modeling tropical precipitation with a limited observational rainfall network. This study customized a RCM model with particular interest in precipitation process using several precipitation data sets for validation. Various convective schemes and micro-physics sensitivities were performed. It was found that the convective scheme of MIT-Emanuel in conjunction with reducing the relative humidity threshold for cloud formation provided the most realistic simulation in terms of spatial distribution, convective partition, rainfall totals and temperature bias when compared with observations. The above RCM customization was run for approximately 40 years to determine the models ability to capture inter-annual variability and the possible climate change fingerprint over the region. The RCM is able to capture the inter-annual variability for all places and seasons for temperature. However, the positive precipitation bias limits the models ability to capture inter-annual variability of precipitation. Despite, the low inter-annual precipitation correlation, the RCM is able to simulate large scale changes in the rainfall pattern associated with the possible climate change fingerprint and the annual precipitation cycle associated with the monsoon. Since the model was able to capture possible changes associated with climate change, the model was downscaled for climate change simulations. The Finite Volume GCM (FVGCM) is used as the lateral boundary forcing for A2 scenario RCM climate change simulations. The FVGCM was compared with the other IPCC models and found to perform within the range during the contemporary climate for circulation, precipitation and temperature. Our analysis concluded that the FVGCM has a cool and wet bias compared to the other GCMs. The RCM future climate simulations, using an A2 emission scenario, show that average temp.
Author: Saeid Eslamian
Publisher: CRC Press
ISBN: 1351851160
Category : Science
Languages : en
Pages : 761
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Book Description
This volume includes over 30 chapters, written by experts from around the world. It examines the environmental aspects of drought such as groundwater and soil contamination, river low-flow, urban water quality, and desertification. It also examines the effects of climate change and variability on drought, and discusses the differences in groundwater, rainfall, and temperatures and their related effects. It presents analytical modeling for better understanding drought in uncertain and changing climates.
Author: Stephane Hallegatte
Publisher: World Bank Publications
ISBN: 1464806748
Category : Business & Economics
Languages : en
Pages : 227
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Book Description
Ending poverty and stabilizing climate change will be two unprecedented global achievements and two major steps toward sustainable development. But the two objectives cannot be considered in isolation: they need to be jointly tackled through an integrated strategy. This report brings together those two objectives and explores how they can more easily be achieved if considered together. It examines the potential impact of climate change and climate policies on poverty reduction. It also provides guidance on how to create a “win-win†? situation so that climate change policies contribute to poverty reduction and poverty-reduction policies contribute to climate change mitigation and resilience building. The key finding of the report is that climate change represents a significant obstacle to the sustained eradication of poverty, but future impacts on poverty are determined by policy choices: rapid, inclusive, and climate-informed development can prevent most short-term impacts whereas immediate pro-poor, emissions-reduction policies can drastically limit long-term ones.
Author: Lena M. Tallaksen
Publisher: Gulf Professional Publishing
ISBN: 9780444516886
Category : Mathematics
Languages : en
Pages : 634
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Book Description
The majority of the examples are taken from regions where the rivers run most of the year.
