Global warming: causes and impacts on agroecosystems productivity and food security with emphasis on cassava comparative advantage in the tropics/subtropics

2014 ◽  
Vol 52 (2) ◽  
pp. 161-178 ◽  
Author(s):  
M. A. El-Sharkawy
Keyword(s):  
Global Warming ◽  
Food Security ◽  
Comparative Advantage ◽  
The Tropics

scholarly journals LivestockPlus: Forages, sustainable intensification, and food security in the tropics

AMBIO ◽  
2015 ◽  
Vol 44 (7) ◽  
pp. 685-693 ◽  
Author(s):  
Thomas K. Rudel ◽  
Birthe Paul ◽  
Douglas White ◽  
I. M. Rao ◽  
Rein Van Der Hoek ◽  
...  
Keyword(s):  
Food Security ◽  
Sustainable Intensification ◽  
The Tropics

scholarly journals The global palm oil sector must change to save biodiversity and improve food security in the tropics

2017 ◽  
Vol 203 ◽  
pp. 457-466 ◽  
Author(s):  
Badrul Azhar ◽  
Norzanalia Saadun ◽  
Margi Prideaux ◽  
David B. Lindenmayer
Keyword(s):  
Food Security ◽  
Palm Oil ◽  
Oil Sector ◽  
The Tropics ◽  
Improve Food Security

scholarly journals Community Adaptation Model of Food Security Due to Global Warming in Kulon Progo

2017 ◽  
Author(s):  
Sri Rum Giyarsih
Keyword(s):  
Climate Change ◽  
Global Warming ◽  
Food Security ◽  
Survey Methods ◽  
Secondary Data ◽  
Primary Data ◽  
Structured Interviews ◽  
Intergovernmental Panel ◽  
Average Temperature ◽  
The Impact

Global warming is the increase in the average temperature of the Earth’s surface. According to the IPCC (Intergovernmental Panel on Climate Change) average temperature of the Earth’s surface was global warming is the increase in the average temperature of the 0.74 ± 0.18 0C (1.33 ± 0.32 F) over the last hundred years. The impact of rising temperatures is the climate change effect on agricultural production. If the community does not craft made adaptation to global warming will have an impact on food security. This research aims to know the society’s adaptation to food security as a result of global warming and to know the influence of global warming on food security. The research was carried out based on survey methods. The influence of global warming on food security is identified with a share of household food expenditure and the identification of rainfall. Sampling was done by random sampling. The Data used are the primary and secondary data. Primary Data obtained through structured interviews and depth interview using a questionnaire while the secondary data retrieved from publication data of the Central Bureau Statistics B(BPS), Department of Agriculture and Climatology Meteorology and Geophysics (BMKG). The expected results of the study is to know variations of food security due to global warming in Kulon Progo Regency. Comprehensive knowledge through community participation and related Government increased food security that is used as the basis for drafting the model society’s adaptation to the impacts of global warming.

scholarly journals Net global warming potential and greenhouse gas intensity in rice agriculture driven by high yields and nitrogen use efficiency: a 5 year field study

2015 ◽  
Vol 12 (22) ◽  
pp. 18883-18911 ◽  
Author(s):  
X. Zhang ◽  
Z. Zhou ◽  
Y. Liu ◽  
X. Xu ◽  
J. Wang ◽  
...  
Keyword(s):  
Global Warming ◽  
Food Security ◽  
Nitrogen Use Efficiency ◽  
Global Warming Potential ◽  
Rice Agriculture ◽  
Nitrogen Use ◽  
Use Efficiency ◽  
Greenhouse Gas Intensity ◽  
High Yields ◽  
Net Global Warming Potential

Abstract. Our understanding of how net global warming potential (NGWP) and greenhouse gas intensity (GHGI) is affected by management practices aimed at food security with respect to rice agriculture remains limited. In the present study, a 5 year field experiment was conducted in China to evaluate the effects of integrated soil-crop system management (ISSM) on NGWP and GHGI after accounting for carbon dioxide (CO2) emissions from all sources (methane, CH4, and nitrous oxide, N2O, emissions, agrochemical inputs, Ei, and farm operations, Eo) and sinks (i.e., soil organic carbon, SOC, sequestration). For the improvement of rice yield and agronomic nitrogen use efficiency (NUE), four ISSM scenarios consisting of different nitrogen (N) fertilization rates relative to the local farmers' practice (FP) rate were carried out, namely, N1 (25 % reduction), N2 (10 % reduction), N3 (FP rate) and N4 (25 % increase). The results showed that compared with the FP, the four ISSM scenarios, i.e., N1, N2, N3 and N4, significantly increased the rice yields by 10, 16, 28 and 41 % and the agronomic NUE by 75, 67, 86 and 82 %, respectively. In addition, compared with the FP, the N1 and N2 scenarios significantly reduced the GHGI by 14 and 18 %, respectively, despite similar NGWPs. The N3 and N4 scenarios remarkably increased the NGWP and GHGI by an average of 67 and 36 %, respectively. In conclusion, the ISSM strategies are promising for both food security and environmental protection, and the ISSM scenario of N2 is the optimal strategy to realize high yields and high NUE together with low environmental impacts for this agricultural rice field.

scholarly journals Temporal changes in arthropod activity in tropical anthropogenic forests

2018 ◽  
Vol 108 (6) ◽  
pp. 792-799 ◽  
Author(s):  
G.-J. Brandon-Mong ◽  
J.E. Littlefair ◽  
K.-W. Sing ◽  
Y.-P. Lee ◽  
H.-M. Gan ◽  
...  
Keyword(s):  
Land Use ◽  
Global Warming ◽  
Biodiversity Loss ◽  
Well Being ◽  
Peninsular Malaysia ◽  
Feedback Mechanism ◽  
Maximum Temperature ◽  
Arthropod Communities ◽  
Reserve Forest ◽  
The Tropics

AbstractArthropod communities in the tropics are increasingly impacted by rapid changes in land use. Because species showing distinct seasonal patterns of activity are thought to be at higher risk of climate-related extirpation, global warming is generally considered a lower threat to arthropod biodiversity in the tropics than in temperate regions. To examine changes associated with land use and weather variables in tropical arthropod communities, we deployed Malaise traps at three major anthropogenic forests (secondary reserve forest, oil palm forest, and urban ornamental forest (UOF)) in Peninsular Malaysia and collected arthropods continuously for 12 months. We used metabarcoding protocols to characterize the diversity within weekly samples. We found that changes in the composition of arthropod communities were significantly associated with maximum temperature in all the three forests, but shifts were reversed in the UOF compared with the other forests. This suggests arthropods in forests in Peninsular Malaysia face a double threat: community shifts and biodiversity loss due to exploitation and disturbance of forests which consequently put species at further risk related to global warming. We highlight the positive feedback mechanism of land use and temperature, which pose threats to the arthropod communities and further implicates ecosystem functioning and human well-being. Consequently, conservation and mitigation plans are urgently needed.

scholarly journals Mitigation efforts will not fully alleviate the increase in water scarcity occurrence probability in wheat-producing areas

2019 ◽  
Vol 5 (9) ◽  
pp. eaau2406 ◽  
Author(s):  
Miroslav Trnka ◽  
Song Feng ◽  
Mikhail A. Semenov ◽  
Jørgen E. Olesen ◽  
Kurt Christian Kersebaum ◽  
...  
Keyword(s):  
Climate Change ◽  
Global Warming ◽  
Food Security ◽  
Water Scarcity ◽  
Climate Change Mitigation ◽  
Paris Agreement ◽  
Representative Concentration Pathway ◽  
Occurrence Probability ◽  
Negative Effects ◽  
Change Mitigation

Global warming is expected to increase the frequency and intensity of severe water scarcity (SWS) events, which negatively affect rain-fed crops such as wheat, a key source of calories and protein for humans. Here, we develop a method to simultaneously quantify SWS over the world’s entire wheat-growing area and calculate the probabilities of multiple/sequential SWS events for baseline and future climates. Our projections show that, without climate change mitigation (representative concentration pathway 8.5), up to 60% of the current wheat-growing area will face simultaneous SWS events by the end of this century, compared to 15% today. Climate change stabilization in line with the Paris Agreement would substantially reduce the negative effects, but they would still double between 2041 and 2070 compared to current conditions. Future assessments of production shocks in food security should explicitly include the risk of severe, prolonged, and near-simultaneous droughts across key world wheat-producing areas.

scholarly journals Global Hydrological Cycle Response to Rapid and Slow Global Warming

2013 ◽  
Vol 26 (22) ◽  
pp. 8781-8786 ◽  
Author(s):  
Larissa Back ◽  
Karen Russ ◽  
Zhengyu Liu ◽  
Kuniaki Inoue ◽  
Jiaxu Zhang ◽  
...  
Keyword(s):  
Global Warming ◽  
Water Vapor ◽  
Surface Temperature ◽  
Global Surface Temperature ◽  
Rate Of Increase ◽  
The Tropics ◽  
Precipitation Changes ◽  
Global Surface ◽  
Global Mean ◽  
Global Water

Abstract This study analyzes the response of global water vapor to global warming in a series of fully coupled climate model simulations. The authors find that a roughly 7% K−1 rate of increase of water vapor with global surface temperature is robust only for rapid anthropogenic-like climate change. For slower warming that occurred naturally in the past, the Southern Ocean has time to equilibrate, producing a different pattern of surface warming, so that water vapor increases at only 4.2% K−1. This lower rate of increase of water vapor with warming is not due to relative humidity changes or differences in mean lower-tropospheric temperature. A temperature of over 80°C would be required in the Clausius–Clapeyron relationship to match the 4.2% K−1 rate of increase. Instead, the low rate of increase is due to spatially heterogeneous warming. During slower global warming, there is enhanced warming at southern high latitudes, and hence less warming in the tropics per kelvin of global surface temperature increase. This leads to a smaller global water vapor increase, because most of the atmospheric water vapor is in the tropics. A formula is proposed that applies to general warming scenarios. This study also examines the response of global-mean precipitation and the meridional profile of precipitation minus evaporation and compares the latter to thermodynamic scalings. It is found that global-mean precipitation changes are remarkably robust between rapid and slow warming. Thermodynamic scalings for the rapid- and slow-warming zonal-mean precipitation are similar, but the precipitation changes are significantly different, suggesting that circulation changes are important in driving these differences.

Sign in / Sign up

Export Citation Format

Share Document