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Satellite monitoring of vegetation and geology in semi-arid environments (1980)

Kihlblom, U. ; Johansson, D.

In: CASI

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Publication Date: 2019-06-28

Description: The possibility of mapping various characteristics of the natural environment of Tanzania by various LANDSAT techniques was assessed. Interpretation and mapping were carried out using black and white as well as color infrared images on the scale of 1:250,000. The advantages of several computer techniques were also assessed, including contrast-stretched rationing, differential edge enhancement; supervised classification; multitemporal classification; and change detection. Results Show the most useful image for interpretation comes from band 5, with additional information being obtained from either band 6 or band 7. The advantages of using color infrared images for interpreting vegetation and geology are so great that black and white should be used only to supplement the colored images.

Keywords: EARTH RESOURCES AND REMOTE SENSING

Type: E83-10343 , NASA-CR-172669 , NAS 1.26:172669

Format: application/pdf

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Climate economics support for the UN climate targets (2020)

Hänsel, M. ; Drupp, M. ; Johansson, D. ; [et al.]

In: Nature Climate Change

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Publication Date: 2023-07-27

Description: Under the UN Paris Agreement, countries committed to limiting global warming to well below 2 °C and to actively pursue a 1.5 °C limit. Yet, according to the 2018 Economics Nobel laureate William Nordhaus, these targets are economically suboptimal or unattainable and the world community should aim for 3.5 °C in 2100 instead. Here, we show that the UN climate targets may be optimal even in the Dynamic Integrated Climate–Economy (DICE) integrated assessment model, when appropriately updated. Changes to DICE include more accurate calibration of the carbon cycle and energy balance model, and updated climate damage estimates. To determine economically ‘optimal’ climate policy paths, we use the range of expert views on the ethics of intergenerational welfare. When updates from climate science and economics are considered jointly, we find that around three-quarters (or one-third) of expert views on intergenerational welfare translate into economically optimal climate policy paths that are consistent with the 2 °C (or 1.5 °C) target.

Type: info:eu-repo/semantics/article

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