Stefan Grab
Datos Biográficos
| ID | 1813290 |
|---|---|
| NOMBRE | Stefan Grab |
| NOMBRES | Stefan |
| APELLIDO | Grab |
| FIRMA | GRAB S |
| AFILIACIONES | University of the Witwatersrand |
| ORCID | 0000-0001-7678-1526 |
| VERIFICADO | Sí |
| TOTAL DE OBRAS | 20 |
| TOTAL DE CITAS | 16 |
| TOTAL COMO AUTOR | 19 |
| TOTAL COMO EDITOR | 1 |
| PRIMER AÑO DE PUBLICACIÓN | 1998 |
| AÑO MÁS RECIENTE DE PUBLICACIÓN | 2024 |
| ÍNDICE H | 2 |
A new flood chronology for KwaZulu-Natal (1836–2022)
In April 2022, flooding and associated geohazards caused major loss of life and extensive damage in the greater Durban region and large areas of the KwaZulu-Natal (KZN) coastal zone. Heavy rainfall that triggered the flooding and mass movement events was reported in national and international media as having ‘smashed weather records’. However, no systematic and up-to-date flood record exists for KZN to allow the April 2022 floods to be viewed wit…
Perceived impacts of climate change on rural poultry production
Rural farming households in developing countries frequently contend with multiple challenges, including a lack of resources, food insecurity, and poverty. Climate change threatens to compound existing challenges, particularly in such rural subsistence economies with limited adaptive capacity. We aim to establish farmers' perspectives on likely impacts of climate change on their rural poultry production in northern South Africa. A baseline questio…
Basalt pseudokarst development in the Lesotho Highlands, southern Africa
The case of Tehran's urban heat island, Iran
“But what silence! No more gazelles…”
Whose knowledge matters in climate change adaptation? Perceived and measured rainfall trends during the last half century in south‐western Tanzania
Parts of eastern Africa have experienced substantial climatic variability and extremes during the last few decades. Here we explore the extent to which local place‐based knowledge is used and is relevant to understanding and appropriately responding to place‐based climate variability and change (specifically rainfall) in an area of considerable rainfall variability in south‐western Tanzania. Primary data were collected using focus group discussio…
Projected changes in tropical cyclones over the South West Indian Ocean under different extents of global warming
The Paris Agreement achieved in December 2015 established that the signatory countries should pursue to hold the increase in global average temperature to below 2 °C relative to the preindustrial period and to strive to limit the temperature increase to 1.5 °C below the preindustrial period. The potential changes in tropical cyclones over the basin making landfall over southern Africa under the key global temperature goals have not been thoroughl…
Drainage network morphometry and evolution in the eastern Lesotho highlands, southern Africa
Late-Holocene climate and vegetation dynamics in eastern Lesotho highlands
The eastern Lesotho highlands are of considerable hydrological importance to southern Africa as a so-called ‘water tower’ for the surrounding region. Here, we contribute proxy-data inferring climate and vegetation changes over the past 1600 years, assessing in parallel inorganic and organic chemical analyses on a sediment core from Ladybird wetland, eastern Lesotho. Several proxies were used to determine changes in local vegetation dynamics, prod…
Quaternary Environmental Change in Southern Africa
Ongoing climate change necessitates advances in our understanding of the interrelationships between climate, landscape-shaping processes and human activity over long time periods, especially in areas that are already climatically stressed. This volume presents new ideas on macroscale landscape evolution; mountain, fluvial and aeolian processes; and environments in southern Africa, a key region in the story of human evolution during the last two m…
“But what silence! No more gazelles…”
Holocene climatic variability indicated by a multi-proxy record from southern Africa’s highest wetland
The eastern Lesotho Highlands experience climate patterns distinct from those of surrounding lower altitude regions, representing a niche environment with a unique biodiversity, leading to well-adapted but restricted vegetation. This study explores changes in the Holocene composition of diatoms and pollen at southern Africa’s highest altitude wetland (Mafadi: 3390 m a.s.l.). The palaeoenvironmental record for Mafadi Wetland indicates fluctuations…
Landscapes and Landforms of South Africa
Assessment of Social Vulnerability to Natural Hazards in the Mountain Kingdom of Lesotho
Lesotho's landlocked mountainous setting with thin regolith cover and poor economic situation make it vulnerable to hazardous events associated with climate such as drought, floods, strong winds, heavy snowfall, and severe frost. To date, no quantitatively based vulnerability assessment has been undertaken in this heavily populated, developing region in southern Africa. The primary aim of this study was to assess social vulnerability of communiti…
Continental-scale temperature variability during the past two millennia
Temperature variability over Africa during the last 2000 years
A growing number of proxy, historical and instrumental data sets are now available from continental Africa through which past variations in temperature can be assessed. This paper, co-authored by members of the PAGES Africa2k Working Group, synthesises published material to produce a record of temperature variability for Africa as a whole spanning the last 2000 years. The paper focuses on temperature variability during the ‘Medieval Climate Anoma…
We are burning in the sun and the fields are not good”
Regional Contrasts in Mountain Tourism Development in the Drakensberg, South Africa
The Drakensberg is the highest mountain range in southern Africa and is considered a valuable natural and economic resource; it is also a primary tourist destination in the region. The present article compares recent tourism development and management in the well-established Royal Natal National Park (RNNP) and the adjoining Mnweni Valley, which is a developing center and former apartheid homeland. Trends in tourist characteristics, governance, a…
Debris ridges along the southern Drakensberg escarpment as evidence for Quaternary glaciation in southern Africa
Non-Sorted Patterned Ground in the High Drakensberg, Southern Africa
This paper presents empirical data on non-sorted patterned ground in the high Drakensberg. Some morphological and sedimentary characteristics for thufur and nonsorted steps are provided. The study also examines process data on ground heave activity at a thufur site. Contemporary cryogenic activity at the non-sorted steps is indicative that the patterns are at least seasonally active. Soil heave measurements at the Mashai Valley thufur site suppor…
Temperature variability over Africa during the last 2000 years
A growing number of proxy, historical and instrumental data sets are now available from continental Africa through which past variations in temperature can be assessed. This paper, co-authored by members of the PAGES Africa2k Working Group, synthesises published material to produce a record of temperature variability for Africa as a whole spanning the last 2000 years. The paper focuses on temperature variability during the ‘Medieval Climate Anoma…
Holocene climatic variability indicated by a multi-proxy record from southern Africa’s highest wetland
The eastern Lesotho Highlands experience climate patterns distinct from those of surrounding lower altitude regions, representing a niche environment with a unique biodiversity, leading to well-adapted but restricted vegetation. This study explores changes in the Holocene composition of diatoms and pollen at southern Africa’s highest altitude wetland (Mafadi: 3390 m a.s.l.). The palaeoenvironmental record for Mafadi Wetland indicates fluctuations…
Late-Holocene climate and vegetation dynamics in eastern Lesotho highlands
The eastern Lesotho highlands are of considerable hydrological importance to southern Africa as a so-called ‘water tower’ for the surrounding region. Here, we contribute proxy-data inferring climate and vegetation changes over the past 1600 years, assessing in parallel inorganic and organic chemical analyses on a sediment core from Ladybird wetland, eastern Lesotho. Several proxies were used to determine changes in local vegetation dynamics, prod…
Non-Sorted Patterned Ground in the High Drakensberg, Southern Africa
This paper presents empirical data on non-sorted patterned ground in the high Drakensberg. Some morphological and sedimentary characteristics for thufur and nonsorted steps are provided. The study also examines process data on ground heave activity at a thufur site. Contemporary cryogenic activity at the non-sorted steps is indicative that the patterns are at least seasonally active. Soil heave measurements at the Mashai Valley thufur site suppor…
Debris ridges along the southern Drakensberg escarpment as evidence for Quaternary glaciation in southern Africa
Regional Contrasts in Mountain Tourism Development in the Drakensberg, South Africa
The Drakensberg is the highest mountain range in southern Africa and is considered a valuable natural and economic resource; it is also a primary tourist destination in the region. The present article compares recent tourism development and management in the well-established Royal Natal National Park (RNNP) and the adjoining Mnweni Valley, which is a developing center and former apartheid homeland. Trends in tourist characteristics, governance, a…
We are burning in the sun and the fields are not good”
Continental-scale temperature variability during the past two millennia
Temperature variability over Africa during the last 2000 years
A growing number of proxy, historical and instrumental data sets are now available from continental Africa through which past variations in temperature can be assessed. This paper, co-authored by members of the PAGES Africa2k Working Group, synthesises published material to produce a record of temperature variability for Africa as a whole spanning the last 2000 years. The paper focuses on temperature variability during the ‘Medieval Climate Anoma…
Landscapes and Landforms of South Africa
Assessment of Social Vulnerability to Natural Hazards in the Mountain Kingdom of Lesotho
Lesotho's landlocked mountainous setting with thin regolith cover and poor economic situation make it vulnerable to hazardous events associated with climate such as drought, floods, strong winds, heavy snowfall, and severe frost. To date, no quantitatively based vulnerability assessment has been undertaken in this heavily populated, developing region in southern Africa. The primary aim of this study was to assess social vulnerability of communiti…
Quaternary Environmental Change in Southern Africa
Ongoing climate change necessitates advances in our understanding of the interrelationships between climate, landscape-shaping processes and human activity over long time periods, especially in areas that are already climatically stressed. This volume presents new ideas on macroscale landscape evolution; mountain, fluvial and aeolian processes; and environments in southern Africa, a key region in the story of human evolution during the last two m…
“But what silence! No more gazelles…”
Holocene climatic variability indicated by a multi-proxy record from southern Africa’s highest wetland
The eastern Lesotho Highlands experience climate patterns distinct from those of surrounding lower altitude regions, representing a niche environment with a unique biodiversity, leading to well-adapted but restricted vegetation. This study explores changes in the Holocene composition of diatoms and pollen at southern Africa’s highest altitude wetland (Mafadi: 3390 m a.s.l.). The palaeoenvironmental record for Mafadi Wetland indicates fluctuations…
Whose knowledge matters in climate change adaptation? Perceived and measured rainfall trends during the last half century in south‐western Tanzania
Parts of eastern Africa have experienced substantial climatic variability and extremes during the last few decades. Here we explore the extent to which local place‐based knowledge is used and is relevant to understanding and appropriately responding to place‐based climate variability and change (specifically rainfall) in an area of considerable rainfall variability in south‐western Tanzania. Primary data were collected using focus group discussio…
Projected changes in tropical cyclones over the South West Indian Ocean under different extents of global warming
The Paris Agreement achieved in December 2015 established that the signatory countries should pursue to hold the increase in global average temperature to below 2 °C relative to the preindustrial period and to strive to limit the temperature increase to 1.5 °C below the preindustrial period. The potential changes in tropical cyclones over the basin making landfall over southern Africa under the key global temperature goals have not been thoroughl…
Drainage network morphometry and evolution in the eastern Lesotho highlands, southern Africa
Late-Holocene climate and vegetation dynamics in eastern Lesotho highlands
The eastern Lesotho highlands are of considerable hydrological importance to southern Africa as a so-called ‘water tower’ for the surrounding region. Here, we contribute proxy-data inferring climate and vegetation changes over the past 1600 years, assessing in parallel inorganic and organic chemical analyses on a sediment core from Ladybird wetland, eastern Lesotho. Several proxies were used to determine changes in local vegetation dynamics, prod…
“But what silence! No more gazelles…”
The case of Tehran's urban heat island, Iran
Perceived impacts of climate change on rural poultry production
Rural farming households in developing countries frequently contend with multiple challenges, including a lack of resources, food insecurity, and poverty. Climate change threatens to compound existing challenges, particularly in such rural subsistence economies with limited adaptive capacity. We aim to establish farmers' perspectives on likely impacts of climate change on their rural poultry production in northern South Africa. A baseline questio…
Basalt pseudokarst development in the Lesotho Highlands, southern Africa
A new flood chronology for KwaZulu-Natal (1836–2022)
In April 2022, flooding and associated geohazards caused major loss of life and extensive damage in the greater Durban region and large areas of the KwaZulu-Natal (KZN) coastal zone. Heavy rainfall that triggered the flooding and mass movement events was reported in national and international media as having ‘smashed weather records’. However, no systematic and up-to-date flood record exists for KZN to allow the April 2022 floods to be viewed wit…
Geography (19 obras) · Geology (14 obras) · Climate change (12 obras) · Archaeology (9 obras) · Ecology (9 obras) · Physical geography (9 obras) · Geology and Paleoclimatology Research (8 obras) · Climatology (7 obras) · Oceanography (7 obras) · Paleontology (7 obras)