Climate of the earth has never been strictly  constant in the recent almost 5 billion years. The shorter or longer time  changes and fluctuations lead to changes in state of the geographical skin, or,  with its more recent and frequent name, the environment. This is why a fourth  sub-chapter has been opened in our homepage, for the response to effects of  clime given or due by the society, besides the other three ones, i.e. past,  present (recent past) and future. 
          Climatology is embedded into various other  sciences, which often leads to discussions even on the concepts of climate, as  well as of climate change and fluctuation. Even more frequent and heavy  discussions are observed on causes and likelihood of continuation of the  present climate change, since the times we are faced to the risk of  human-induced climate change. Our homepage does not intend to prefer any view or  scientific result against the others in these questions. Nevertheless we still  transfer a system of scientific paradigms via selection of the sites and  proportions of the views reflected in this selection. But, this is definitely  one of the missions of the GEOGRAPHY nEtQUIPMENT to systematise and forward  that part of knowledge which has been established by the professional (not by the  “official”) science.  
          Probably, you have already recognised, Dear  Reader, that we have a separate entry called Meteorology, as well. It is not  our intention, by this, to put our vote to such a classification of sciences.  It has a rather practical reason, since there are so many interesting and  useful sources in both topics that this may explain the separation, itself. So,  materials and referring homepages about the weather,  i.e. on definite sequence of the atmospheric states for shorter period of time  are arranges into Meteorology. Those questions in which these states correspond  to longer period of time, with no special emphasis on their sequence, but  treated as statistical ensembles, i.e. to climate,  we sorted into Climatology.
          
          
            
              -                 Prekambric és Paleozoic (4.6 billion - 230 million        years) 
 
                
              
                - Archaic Era (4.6 billion - 2,5 billion years) 
 
                - Proterozoic (2.5 billion – 545 million         years) 
 
                - From Cambrian until Devonian (545 million – 360 million         years)
 
                - Carboniferous and Permian (360 million – 230 million         years)
 
                  
               
              -                 Mesozoic and Tertiary (230 million - 2.4 million        years) 
 
                
              
                - Triassic (230 million -195 million         years) 
 
                - Jurasic (195 million – 145 million         years) 
 
                - Cretaceous (145 million – 65 million         years)
 
                - Tertiary (65 million – 2.4 million         years)
 
                  
               
              - Pleisztocene (2.4 million – 10 thousand        years) 
 
                
              
                - Early Pleisztocene until Günz (2.4 million – 820 thousand         years) 
 
                - Late Günz until Mindel (820 thousand – 320 thousand         years) 
 
                - Late Mindel until Riss (320 thousand – 120 thousand         years)
 
                - Late Riss until Würm (120 thousand – 10 thousand         years)
 
                  
                 
              - Holocene (from 10 thousand years BP until        Present Time)
 
                
              
             
            - Climate of the       Present 
 
              
            
              - Climate, climate        forming factors
 
                
              
                - Climate, its         concept and spatial scales
 
                - Spatial and         temporal characteristics of the solar radiation
 
                - Altitude and         substance of the surface 
 
                - Role of         atmosphere and oceans in climate formation
 
                  
               
              - Climate of        the Earth
 
                
              
                - Zonality of climate         and its anomalies
 
                - Classifications         of climates in the Earth
 
                - Climate of         distant continents
 
                - Climate of Europe
 
                  
               
              - Climate of Hungary:        averages and extremities
 
                
              
                - Solar         radiation, radiation balance
 
                - Temperature         characteristics
 
                - Precipitation         and humidity conditions
 
                - Air pressure         and wind conditions
 
                  
               
              - Topo- and        microclimates
 
                
              
                - Microclimate         of vegetation 
 
                - Effect of         topography and exposition
 
                - Meso- and         microclimates of horizontally non-homogenous surfaces
 
                - Indoor         microclimates
 
                  
               
             
            - Climate of the       Future 
 
              
            
              - Changes in        climate forcing factors and radiation balance
 
                
              
              - Observed        changes of climate 
 
                
              
              - Modelling and        understanding the climate system
 
                
              
              - Global and        regional predictions (scenarios)
 
                
              
             
            - Climate       impacts and response activities
 
              
            
              - Adaptation of        the Nature and the Society to the actual climate
 
                
              
                - Effect of         climate on geomorphology of the Earth
 
                - Effect of         climate on the geographical distribution of plants and animals
 
                - Our built         environment from the Equator to the Poles
 
                - Physiological         and social signals of adaptation of homo         sapiens 
 
                  
               
              - Impacts and        adaptation challenges of the anthropogenic climate change 
 
                
              
                - Climate         impacts on water resources and water demands
 
                - Climate         impacts on plants and animals
 
                - Climate impacts         on energy demands and transport
 
                - Climate         impacts on air quality and urban heat islands
 
                  
               
              - Conditions        and agenda to mitigate the climate change
 
                
              
                - Population         of the earth and the per capita consumption (production)
 
                - Energy         demand of a consumption (production) unit 
 
                - Greenhouse         gas emission of a unit energy consumption
 
                - International         agreements of climate change mitigation
 
                  
               
              - Impacts and        responses in Hungary
 
                
              
                - Scientific         research on climate impact 
 
                - First         initiatives of the intentional adaptation
 
                - On climate         mitigation
 
                - Law sources         on climate change in Hungary
 
               
             
           
            
            Internet source  (downloaded on March 30, 2009). 
            http://fp.arizona.edu/kkh/climate/images/Global.climate.map.med.jpg 
          
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