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| Titel |
Forecasting global urban expansion and its effect on terrestrial net primary
productivity |
| VerfasserIn |
Xuecao Li, Le Yu, Xiaoping Liu, Peng Gong |
| Konferenz |
EGU General Assembly 2016
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 18 (2016) |
| Datensatznummer |
250122504
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| Publikation (Nr.) |
 EGU/EGU2016-1551.pdf |
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| Zusammenfassung |
| Net primary productivity (NPP) is of great importance to global terrestrial carbon cycle
and global climate change. Although many relevant studies have been carried out,
attempts on its consequence caused by urban expansion are still limited. In this study,
we quantified the NPP loss after urbanization by 2100, through linking a global
land use/cover dynamic (GLCD) model and a neighborhood proxy method. Finer
resolution (30m) global land cover map as well as detailed land demand dataset
(half degree) were adopted for urban growth modeling and NPP quantification. Our
results indicate that (1) by 2100, the global urban area will reach 125.15×10^4 km2,
with a growth rate of 2,892 km2/year; (2) the NPP loss due to urbanization during
period of 2010-2100 is 9×10^(-3) PgC, which accounts more than 3% of the total
urban NPP in 2010. In addition, by the end of this century, most urbanized land is
estimated to happen in developing countries, e.g. China and India. Overall, global urban
expansion results a neglect impact to NPP. Therefore, more attentions should be paid to
cope with urban development in future, such as urban planning or managements. |
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