2,242 Works

Monthly Means Of Daily Maximum Relative Humidity (%) July

, &
Daily minimum and maximum relative humidity is necessary as relative humidity, defined for practical purposes as the ratio of actual to saturated vapour pressure, expressed as a percentage generally varies considerably in the course of a day because, despite actual vapour pressure, ed, remaining relatively constant, saturated vapour pressure, ea, varies curvilinearly with temperature. The minimum RH of a day is thus experienced during the hottest part of the day when ea is high and...

January Means Of Reference Crop Evaporation (mm) Fao Penman-Monteith Equivalent

, &
The FAO (1992) definition of Penman-Monteith derived reference crop evaporation (Erpm) is `The rate of evapotranspiration from a hypothetical crop with an assumed crop height of 0.12 m, a fixed canopy resistance of 70 s.m-1 and albedo of 0.23, which would closely resemble evapotranspiration from an extensive surface of green grass cover of uniform height, actively growing, completely shading the ground and not short of water`. The first detailed maps for South Africa of Penman-Monteith...

Standard Deviations (C) Of Daily Mean Temperature September

&
Under conditions of natural vegetation, mean temperatures are used to distinguish between three broad thermal divisions of plants, viz. mega-thermal plants, which require mean monthly temperatures above 20 degree Celsius for at least 4 months of the year; micro-thermal plants, which grow where 8 months or longer have means below 10 degree Celsius; and the meso-thermal plants of the mid-latitudes, which cover most of South Africa, and whose physiology is adapted to the strong seasonal...

Acacia mearnsii Growth areas and Yield estimation

&
A native of southeastern Australia, Acacia mearnsii is an evergreen tree growing to 15 m in height. A. mearnsii has proved to be the most drought resistant of the commercial hardwoods grown in South Africa (Herbert, 1993). Acacia mearnsii requires a MAP of 750 mm in colder areas and 850 mm where it is warmer (Smith, 1998). Ideally, mean annual temperature should be in the range 16 - 19 degree Celsius, but with A. mearnsii...

Median monthly precipitation (mm) for Far Future (2080 - 2100)

Christopher Jack
Model Run: Far future (2080 - 2100) (Far future (2080 - 2100)). The Self-Organizing Map Downscaling (SOMD) was developed at the Climate Systems Analysis Group (CSAG)[1], University of Cape Town. This is a leading empirical downscaled technique and provides meteorological station level response to global climate change forcing (See Hewitson and Crane (2006) for methodological details and Wilby et al. (2004) for a review of this and other statistical downscaling methodologies). Downscaling of a General...

Rainfall days per month (> 10mm) for Current Climate (1950-1999)

Christopher Jack
Model Run: Control - Current Climate (Observed/current climate as modelled by climate model). The Self-Organizing Map Downscaling (SOMD) was developed at the Climate Systems Analysis Group (CSAG)[1], University of Cape Town. This is a leading empirical downscaled technique and provides meteorological station level response to global climate change forcing (See Hewitson and Crane (2006) for methodological details and Wilby et al. (2004) for a review of this and other statistical downscaling methodologies). Downscaling of a...

Maximum of Minimum Temperature for Current Climate (1950-1999)

Christopher Jack
Model Run: Control - Current Climate (Observed/current climate as modelled by climate model). The Self-Organizing Map Downscaling (SOMD) was developed at the Climate Systems Analysis Group (CSAG)[1], University of Cape Town. This is a leading empirical downscaled technique and provides meteorological station level response to global climate change forcing (See Hewitson and Crane (2006) for methodological details and Wilby et al. (2004) for a review of this and other statistical downscaling methodologies). Downscaling of a...

Minimum of Maximum Temperature for Far Future (2080 - 2100)

Christopher Jack
Model Run: Far future (2080 - 2100) (Far future (2080 - 2100)). The Self-Organizing Map Downscaling (SOMD) was developed at the Climate Systems Analysis Group (CSAG)[1], University of Cape Town. This is a leading empirical downscaled technique and provides meteorological station level response to global climate change forcing (See Hewitson and Crane (2006) for methodological details and Wilby et al. (2004) for a review of this and other statistical downscaling methodologies). Downscaling of a General...

Household Sources of Water

Leo Chiloane
The data was derived from the 2011 national census. Datasets for household sources of water were obtained from the census small area layer data and grouped into the following categories: (i) Municipal, (ii) Dam/Spring/Stream and (iii) Households that do not source water from piped water schemes. A 500m grid was used to map the dwelling frame distribution for South Africa. The resulting dataset was then intersected with the small area layer for the purpose of...

Aquatic Biodiversity Corridors

Geographic\Natural Environment\Biotic\Flora\Vegetation

Broad habitat units (BHU) were derived by identifying areas with a unique combination of homogenous climate, geology, and topography, guided in certain areas by Low and Rebelo (1996). For more details on the methodology see Cowling, R.M., Pressey, R.L., Lombard, A.T., Heijnis, C.E., Richardson, D.M., and Cole, N. Framework for a conservation plan for the Cape Floristic Region. A report for the CAPE Project for WWF: S.A.`

CAPE irreplaceability 2002

Original shape file had the following attributes: Spheroid = Clarke 1880, Units = meters, Central meridian = 22, 1st standard parallel = -34, 2nd standard parallel = -32, Latitude of projection at origin = 0, False easting = 0, False, Northing = 0 Projection was then changed to Geographic and datum to WGS84 using the projection script and datum converter in Arcview.`

Renosterveld Coast interior gradient

Gradients linking the coast to inland regions through natural vegetation/river corridors. Such gradients capture ecological processes operating at a larger scale such as biota migration and adaptation to climate change.

EC CBA reserves2 Project

Gouritz Initiative Processes East-West Mountain Corridors

Two large west-east corridors that stretch across the planning domain, linking the Swartberg and associated mountain chains in the, North. The maintenance of continuous corridors along these mountain chains provides an east-west climatic gradient, ranging from winter rainfall in the west to summer rainfall in the east.

Gouritz Initiative - Vegetation map

Vegetation types for the Gouritz Initiative area. The vegetation types have been graded as well according to percentage protected, percentage remaining and whether it is endemic: - Indication of whether the vegetation type is endemic to the Gouritz Initiative area (see Appendices 1 and 2 in Lombard et al., 2004) - Percentage of the original extent of the vegetation type remaining as of 1998 (see Appendices 1 and 2 in Lombard et al., 2004) -...

Renosterveld Planning Domain

Planning domain of the Cape Lowlands Renosterveld Project consisting of a central part (made up of the Overberg, Boland/Swartland and Elgin Basin) and a 5km buffer.

SKEP Framework for action

Combination of irreplaceability and vulnerability value per planning units. Irreplaceability captures the biodiversity significance of each planning unit in terms of vegetation types and expert features. Vulnerability reflects the potential of future transformation based on urban, crop, ostrich, and mining potential. The Framework field in the dataset has the following meanings: Combination of irreplaceability and vulnerability. Values from 1 to 6 characterise areas of low irreplaceability values (by increasing order of vulnerability; 1: none, 6:...

Spekboom restoration

Vegetation Merge

Western Cape Wetlands Directory Data

This layer was created using point data generated from various reports and studies included in the Western Cape Wetland Directory database (Dallas and Seymour 2006). Wetlands were broadly defined using the definition used by the RAMSAR convention: `areas of marsh, fen, peatland or water, whether natural or artificial, permanent or temporary, with water that is static or flowing, fresh, brackish or salt, including areas of marine water the depth of which at low tides does...

Ecoregions (Level 2) for South Africa

Ecoregions (Level II, version 2005) for South Africa derived from terrain and vegetation, with some consideration of altitude, rainfall, runoff variability, air temperature, geology, soil. Level II ecoregions are a refinement of the Level I ecoregions, using the same methods.

SSO-MOL: Sweet Sorghum - Ethanol Fermentation (MW)

Wim Hugo
Biomass feasibility assesment dataset extracted from the BioEnergy Atlas for South Africa. * Assessments are made of impacts of economy of scale, logistics, and placement on techno-economic feasibility of feedstock and processing combinations, leading to identification of a portfolio of feasible project options. These options are illustrative of areas where bioenergy is likely to be a competitive, sustainable alternative. * Original dataset: https://dx.doi.org/10.15493/BEA.DATA.10000040 * BioEnergy Atlas Synopsis Report: https://dx.doi.org/10.15493/SAEON.BEA.DOCS.10000001

SUG-MOL: Sugar Cane - Ethanol Fermentation (MW)

Wim Hugo
Biomass feasibility assesment dataset extracted from the BioEnergy Atlas for South Africa. * Assessments are made of impacts of economy of scale, logistics, and placement on techno-economic feasibility of feedstock and processing combinations, leading to identification of a portfolio of feasible project options. These options are illustrative of areas where bioenergy is likely to be a competitive, sustainable alternative. * Original dataset: https://dx.doi.org/10.15493/BEA.DATA.10000044 * BioEnergy Atlas Synopsis Report: https://dx.doi.org/10.15493/SAEON.BEA.DOCS.10000001

Population Age Distribution

Leo Chiloane
The data was derived from the 2011 national census. Population age was obtained from the census small area layer data and grouped into the following categories: (i) 0-5 Juvenile, (ii) 6-18 School-going, (iii) 19-30, 31-50, 51-65 Working population, (iv) 66-80 Elderly and (v) 81-102 Frail. A 500m grid was used to map the dwelling frame distribution for South Africa. The resulting dataset was then intersected with the small area layer for the purpose of esmating...

Registration Year

  • 2020
    524
  • 2019
    126
  • 2018
    1,590
  • 2016
    2

Resource Types

  • Dataset
    2,237
  • Audiovisual
    1
  • Interactive Resource
    1
  • Model
    1
  • Software
    1
  • Text
    1

Affiliations

  • South African Environmental Observation Network
    1