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Abstract Editor’s note: For easy download the posted pdf of the State of the Climate for 2017 is a low-resolution file. A high-resolution copy of the report is available by clicking here. Please be patient as it may take a few minutes for the high-resolution file to download.

Abstract Editor’s note: For easy download the posted pdf of the State of the Climate for 2017 is a low-resolution file. A high-resolution copy of the report is available by clicking here. Please be patient as it may take a few minutes for the high-resolution file to download.

Scenario is a story that depicts some events in future. Scenario is not a forecast or a prediction of future, it is description of the possible alternative cases. Additionally, the emission scenario is one of the most important components of climate change studies. Climate is the average weather conditions that occur in a wide area in a very long time. Climate change refers to a change in the state of the climate that can be identified by changes in the mean and/or the variability of its properties and that persists for an extended period, typically decades or longer. Turkey is located in the eastern Mediterranean basin, one of the most vulnerable regions to climate change as stated in the IPCC report. Basin-based, regional-based and provincial-based temperature and precipitation projections were developed for minimizing the negative effects of climate change adaptation and to support activities to combat climate change on a sectoral basis. In this study, GFDL-ESM2M global circulation model outputs, developed by the Geophysical Fluid Dynamics Laboratory connected to the National Oceanic and Atmospheric Administration in United States, were used. Selected scenarios (RCP4.5 and RCP8.5) of this study were the most preferred scenarios in the IPCC 5th Assessment Report. In order to obtain high-resolution climatic parameters from thelow-resolutionglobal model data, nesting method (Nested simulations) were used with Regional Climate Model RegCM4.3.4, then temperature and precipitation projections were produced for 2016-2040, 2041-2070, 2071-2099 periods, relative to the 1971-2000 reference period with 20 km resolution in 130x180 grid matrix. According to results; the increase that is expected in annual mean temperature is 1,5°C based on RCP4.5, and 2.5°C based on RCP8.5. In the amount of precipitation, an average decrease of 10-15 mm/year and 105-110 mm/year is expected based on RCP4.5 and RCP8.5 respectively. Changes in mean temperature and precipitation show some differences on regional, watershed, and provincial level due to various geographical features of our country. Fırat-Dicle basin draws attention as the most sensitive basin in terms of temperature increase. In terms of average annual precipitation change, it is expected that basins, located in Mediterranean Region, will be the most sensitive regions

Scenario is a story that depicts some events in future. Scenario is not a forecast or a prediction of future, it is description of the possible alternative cases. Additionally, the emission scenario is one of the most important components of climate change studies. Climate is the average weather conditions that occur in a wide area in a very long time. Climate change refers to a change in the state of the climate that can be identified by changes in the mean and/or the variability of its properties and that persists for an extended period, typically decades or longer. Turkey is located in the eastern Mediterranean basin, one of the most vulnerable regions to climate change as stated in the IPCC report. Basin-based, regional-based and provincial-based temperature and precipitation projections were developed for minimizing the negative effects of climate change adaptation and to support activities to combat climate change on a sectoral basis. In this study, GFDL-ESM2M global circulation model outputs, developed by the Geophysical Fluid Dynamics Laboratory connected to the National Oceanic and Atmospheric Administration in United States, were used. Selected scenarios (RCP4.5 and RCP8.5) of this study were the most preferred scenarios in the IPCC 5th Assessment Report. In order to obtain high-resolution climatic parameters from thelow-resolutionglobal model data, nesting method (Nested simulations) were used with Regional Climate Model RegCM4.3.4, then temperature and precipitation projections were produced for 2016-2040, 2041-2070, 2071-2099 periods, relative to the 1971-2000 reference period with 20 km resolution in 130x180 grid matrix. According to results; the increase that is expected in annual mean temperature is 1,5°C based on RCP4.5, and 2.5°C based on RCP8.5. In the amount of precipitation, an average decrease of 10-15 mm/year and 105-110 mm/year is expected based on RCP4.5 and RCP8.5 respectively. Changes in mean temperature and precipitation show some differences on regional, watershed, and provincial level due to various geographical features of our country. Fırat-Dicle basin draws attention as the most sensitive basin in terms of temperature increase. In terms of average annual precipitation change, it is expected that basins, located in Mediterranean Region, will be the most sensitive regions

Several large-scale climate patterns influenced climate conditions and weather patterns across the globe during 2010. The transition from a warm El Niño phase at the beginning of the year to a cool La Niña phase by July contributed to many notable events, ranging from record wetness across much of Australia to historically low Eastern Pacific basin and near-record high North Atlantic basin hurricane activity. The remaining five main hurricane basins experienced below- to well-below-normal tropical cyclone activity. The negative phase of the Arctic Oscillation was a major driver of Northern Hemisphere temperature patterns during 2009/10 winter and again in late 2010. It contributed to record snowfall and unusually low temperatures over much of northern Eurasia and parts of the United States, while bringing above-normal temperatures to the high northern latitudes. The February Arctic Oscillation Index value was the most negative since records began in 1950. The 2010 average global land and ocean surface temperature was among the two warmest years on record. The Arctic continued to warm at about twice the rate of lower latitudes. The eastern and tropical Pacific Ocean cooled about 1°C from 2009 to 2010, reflecting the transition from the 2009/10 El Niño to the 2010/11 La Niña. Ocean heat fluxes contributed to warm sea surface temperature anomalies in the North Atlantic and the tropical Indian and western Pacific Oceans. Global integrals of upper ocean heat content for the past several years have reached values consistently higher than for all prior times in the record, demonstrating the dominant role of the ocean in the Earth's energy budget. Deep and abyssal waters of Antarctic origin have also trended warmer on average since the early 1990s. Lower tropospheric temperatures typically lag ENSO surface fluctuations by two to four months, thus the 2010 temperature was dominated by the warm phase El Niño conditions that occurred during the latter half of 2009 and early 2010 and was second warmest on record. The stratosphere continued to be anomalously cool. Annual global precipitation over land areas was about five percent above normal. Precipitation over the ocean was drier than normal after a wet year in 2009. Overall, saltier (higher evaporation) regions of the ocean surface continue to be anomalously salty, and fresher (higher precipitation) regions continue to be anomalously fresh. This salinity pattern, which has held since at least 2004, suggests an increase in the hydrological cycle. Sea ice conditions in the Arctic were significantly different than those in the Antarctic during the year. The annual minimum ice extent in the Arctic—reached in September—was the third lowest on record since 1979. In the Antarctic, zonally averaged sea ice extent reached an all-time record maximum from mid-June through late August and again from mid-November through early December. Corresponding record positive Southern Hemisphere Annular Mode Indices influenced the Antarctic sea ice extents. Greenland glaciers lost more mass than any other year in the decade-long record. The Greenland Ice Sheet lost a record amount of mass, as the melt rate was the highest since at least 1958, and the area and duration of the melting was greater than any year since at least 1978. High summer air temperatures and a longer melt season also caused a continued increase in the rate of ice mass loss from small glaciers and ice caps in the Canadian Arctic. Coastal sites in Alaska show continuous permafrost warming and sites in Alaska, Canada, and Russia indicate more significant warming in relatively cold permafrost than in warm permafrost in the same geographical area. With regional differences, permafrost temperatures are now up to 2°C warmer than they were 20 to 30 years ago. Preliminary data indicate there is a high probability that 2010 will be the 20th consecutive year that alpine glaciers have lost mass. Atmospheric greenhouse gas concentrations continued to rise and ozone depleting substances continued to decrease. Carbon dioxide increased by 2.60 ppm in 2010, a rate above both the 2009 and the 1980–2010 average rates. The global ocean carbon dioxide uptake for the 2009 transition period from La Niña to El Niño conditions, the most recent period for which analyzed data are available, is estimated to be similar to the long-term average. The 2010 Antarctic ozone hole was among the lowest 20% compared with other years since 1990, a result of warmer-than-average temperatures in the Antarctic stratosphere during austral winter between mid-July and early September.