scholarly journals Impact of bushfire and climate variability on streamflow from forested catchments in southeast Australia

2015 ◽  
Vol 60 (7-8) ◽  
pp. 1340-1360 ◽  
Author(s):  
Yanchun Zhou ◽  
Yongqiang Zhang ◽  
Jai Vaze ◽  
Patrick Lane ◽  
Shiguo Xu
Keyword(s):  
Climate Variability ◽  
Forested Catchments ◽  
Southeast Australia

scholarly journals Impact of bushfire and climate variability on streamflow from forested catchments in southeast Australia

2013 ◽  
Vol 10 (4) ◽  
pp. 4397-4437 ◽  
Author(s):  
Y. Zhou ◽  
Y. Zhang ◽  
J. Vaze ◽  
P. Lane ◽  
S. Xu
Keyword(s):  
Climate Variability ◽  
Forest Disturbance ◽  
Natural Disturbance ◽  
Climatic Conditions ◽  
Climate Impacts ◽  
Water Yield ◽  
Hydrological Models ◽  
Forested Catchments ◽  
Southeast Australia ◽  
The Impact

Abstract. Most of the surface water for natural environmental and human water uses in southeast Australia is sourced from forested catchments located in the higher rainfall areas. Water yield of these catchments is mainly affected by climatic conditions, but it is also greatly affected by vegetation cover change. Bushfires are a major natural disturbance in forested catchments and potentially modify the water yield of the catchments through changes to evapotranspiration (ET), interception and soil moisture storage. This paper quantifies the impacts of bushfire and climate variability on streamflow from three southeast Australian catchments where Ash Wednesday bushfires occurred in February 1983. The hydrological models used here include AWRA-L, Xinanjiang and GR4J. The three models are first calibrated against streamflow data from the pre-bushfire period and they are used to simulate runoff for the post-bushfire period with the calibrated parameters. The difference between the observed and model simulated runoff for the post-bushfire period provides an estimate of the impact of bushfire on streamflow. The hydrological modelling results for the three catchments indicate that there is a substantial increase in streamflow in the first 15 yr after the 1983 bushfires. The increase in streamflow is attributed to initial decreases in ET and interception resulting from the fires, followed by logging activity. After 15 yr, streamflow dynamics are more heavily influenced by climate effects, although some impact from fire and logging regeneration may still occur. It is shown that hydrological models provide reasonable consistent estimates of forest disturbance and climate impacts on streamflow for the three catchments. The results might be used by forest managers to understand the relationship between forest disturbance and climate variability impacts on water yield in the context of climate change.

scholarly journals Connections of climate change and variability to large and extreme forest fires in southeast Australia

2021 ◽  
Vol 2 (1) ◽  
Author(s):  
Nerilie J. Abram ◽  
Benjamin J. Henley ◽  
Alex Sen Gupta ◽  
Tanya J. R. Lippmann ◽  
Hamish Clarke ◽  
...  
Keyword(s):  
Climate Change ◽  
Climate Variability ◽  
Forest Fires ◽  
Global Climate ◽  
Fire Risk ◽  
Climate Extremes ◽  
Historical Record ◽  
Climate Trends ◽  
Adaptation Measures ◽  
Southeast Australia

AbstractThe 2019/20 Black Summer bushfire disaster in southeast Australia was unprecedented: the extensive area of forest burnt, the radiative power of the fires, and the extraordinary number of fires that developed into extreme pyroconvective events were all unmatched in the historical record. Australia’s hottest and driest year on record, 2019, was characterised by exceptionally dry fuel loads that primed the landscape to burn when exposed to dangerous fire weather and ignition. The combination of climate variability and long-term climate trends generated the climate extremes experienced in 2019, and the compounding effects of two or more modes of climate variability in their fire-promoting phases (as occurred in 2019) has historically increased the chances of large forest fires occurring in southeast Australia. Palaeoclimate evidence also demonstrates that fire-promoting phases of tropical Pacific and Indian ocean variability are now unusually frequent compared with natural variability in pre-industrial times. Indicators of forest fire danger in southeast Australia have already emerged outside of the range of historical experience, suggesting that projections made more than a decade ago that increases in climate-driven fire risk would be detectable by 2020, have indeed eventuated. The multiple climate change contributors to fire risk in southeast Australia, as well as the observed non-linear escalation of fire extent and intensity, raise the likelihood that fire events may continue to rapidly intensify in the future. Improving local and national adaptation measures while also pursuing ambitious global climate change mitigation efforts would provide the best strategy for limiting further increases in fire risk in southeast Australia.

Implications of Climate Variability on Market Gardening Crop Production in Santa Sub-Division of Cameroon

2015 ◽  
Vol 4 (1) ◽  
pp. 009-018
Author(s):  
Sani Gur Amawa ◽  
◽  
Tata Emmanuel Sunjo ◽  
Edwin Awambeng Azieh ◽  
Jude Ndzifon Kimengsi ◽  
...  
Keyword(s):  
Climate Variability ◽  
Crop Production ◽  
Market Gardening

VARIABILIDAD CLIMÁTICA, CAMBIO CLIMÁTICO Y PESQUERÍAS EN EL ECUADOR.

2012 ◽  
Vol 1 (1) ◽  
Author(s):  
Johnny Chavarría Viteri ◽  
Dennis Tomalá Solano
Keyword(s):  
Climate Change ◽  
Climate Variability ◽  
Pacific Decadal Oscillation ◽  
El Niño ◽  
El Nino ◽  
Southern Oscillation ◽  
El Niño Southern Oscillation ◽  
El Nino Southern Oscillation ◽  
Current Action ◽  
Palabras Clave

La variabilidad climática es la norma que ha modulado la vida en el planeta. Este trabajo demuestra que las pesquerías y acuicultura costera ecuatorianas no son la excepción, puesto que tales actividades están fuertemente influenciadas por la variabilidad ENSO (El Niño-Oscilación del Sur) y PDO (Oscilación Decadal del Pacífico), planteándose que la señal del cambio climático debe contribuir a esta influencia. Se destaca también que, en el análisis de los efectos de la variabilidad climática sobre los recursos pesqueros, el esfuerzo extractivo también debe ser considerado. Por su parte, la acción actual de la PDO está afectando la señal del cambio climático, encontrándose actualmente en fases opuestas. Se espera que estas señales entren en fase a finales de esta década, y principalmente durante la década de los 20 y consecuentemente se evidencien con mayor fuerza los efectos del Cambio Climático. Palabras Clave: Variabilidad Climática, Cambio Climático, ENSO, PDO, Pesquerías, Ecuador. ABSTRACT Climate variability is the standard that has modulated life in the planet. This work shows that the Ecuadorian  fisheries and aquaculture are not the exception, since such activities are strongly influenced by ENSO variability (El Niño - Southern Oscillation) and PDO (Pacific Decadal Oscillation), considering that the signal of climate change should contribute to this influence. It also emphasizes that in the analysis of the effects of climate variability on the fishing resources, the extractive effort must also be considered. For its part, the current action of the PDO is affecting the signal of climate change, now found on opposite phases. It is hoped that these signals come into phase at the end of this decade, and especially during the decade of the 20’s and more strongly evidencing the effects of climate change. Keywords: Climate variability, climate change, ENSO (El Niño - Southern Oscillation) and PDO  (Pacific Decadal Oscillation); fisheries, Ecuador. Recibido: mayo, 2012Aprobado: agosto, 2012

Sign in / Sign up

Export Citation Format

Share Document