CLIMATIC CHANGES AND BRIEFING ON RECENT FIRES IN LOS ANGELES
Weather changes collectively and makes up climates. The fact is that only constant feature of weather is changing. There are diurnal and isopin weather fluctuations and also occur the random passage of the storm system. Several kinds of evidence points to variation in climate. Agriculture, manufacturing commerce and various other human endeavored world require digested adjustment if the world’s climate are to change greatly within.
Like any other physical phenomenon climate is not static but rather a fairly dynamic phenomena. more or less it is ever changing. In view of the profound influence of the climate on very aspect of life at present, it can be offered that its influence on different life forms has been great in the past and is likely to be so in the future too. A change of climate implies a change in plants, animals and human beings as well. It is an established fact that all living species their best under defiant and limited conditions of various climatic elements. Any great diversion from the normal values mean death and destruction of the species.
Tools and Techniques: For Reconstruction of Past Climates
‘proxy’ data, which are inferred from natural climatic indicators stand as a tool for the reconstruction of climates prior to the record of human history. There exist abundant, and sometimes contradictory evidence that indicates marked changes in climate since the creation of the earth.
Important clause are provided by fossils of animals and plant life for secular variation of climate on a scale of thousand to millions of years. They help to determine the duration and areal extent of climatic conditions in distant geological past. Plant and animals fossil in various sedimentary deposits are the primary cause for moisture conditions since the beginning of the Cambrian period nearly 600 Million years ago, when life forms began to develop rapidly and the oxygen content of the atmosphere increase. Fossils are the basic data of paleoclimatology, which borrows its method from palynology. The sustained global temperature such as 100º or -50º C are highly unlikely features of the paleoclimates.
Glaciology is one of the most important fields for investigation of climate changes. The areal extend of glaciers and the resulting landforms reveal the consistent trend in precipitation and temperature. Most of the direct study of glacier fluctuations and climate relation has been carried out in the twentieth century.
Geochronology Earth dating of paleoclimatology is accomplished primarily with refreshen to daisy rates of radioactive isotopes in geological formation and deep sea deposits. The study of buried soils helps in exploring the past conditions of local climate, paleo soils, ancient peat bogs residues from evaporation of water bodies, ice cores and calcium carbonates deposits in caves are other types of records that can be dated by radiometry.
Dendrochronology has also been employed to date the comparatively recent advance and recession of glacier cross-section of trees partly tilted by glacier ice long the margins of maximum advance but left alive reveal the exact year of maximum advance of the glacier. Another approach to geochronology uses pedogenic criteria, that is data obtain from the study of soil development. Old soils have been buried in river flood plains, along fluctuating lake serosa, or under windblown deposits furnish some evidence of the past climates for climate is the most active factor in the soil formation.
Theories of Climate Changes
(CLIMATIC CHANGES AND BRIEFING ON RECENT FIRES IN LOS ANGELES)
The effect of solar distance is of little significance in current seasonal temperature fluctuations, it plays an important role in producing large scale climatic changes in perihelion the sun is nearest to the earth, while aphelion it is farthest from the earth. The difference in the distance is not more than 3 per cent. The difference means that there is a variation of 6% of solar radiation received by the earth.
The earth’s orbit undergoes a change of shape during a cycle of 90,000 and 100,000 years. Sometimes the orbit forms a longer eclipse, and then it returns to a more circular shape. At the time of greater eccentricity of the earth’s orbit, the amount of solar radiation received at the earth’s surface at perihelion may be 20 to 30 percent greater than that of aphelion.
Theories involving Change in the composition of Atmosphere (CLIMATIC CHANGES AND BRIEFING ON RECENT FIRES IN LOS ANGELES )
Carbon dioxide Theory: This theory was advanced by T.C. Chamberlin in the last decade of the nineteenth century. According to this theory variations in the carbon dioxide content of the atmosphere play dominant role in causing worldwide climate changes. This gas is transparent to incoming solar radiation, but absorbs outgoing long wave terrestrial radiation. The absorbed terrestrial radiation is radiated back to the earth’s surface. Carbon dioxide and water vapor contents of the atmosphere being the most important heat absorbers produce what is called the greenhouse effect.
According to the current estimates, the present carbon dioxide content of the atmosphere is 330 ppm (parts per million). It is likely to reach 400 ppm by the end of the century, if the present rate of increase of carbon dioxide continues, this atmospheric gas may double by the year 2040. Consequently, the global temperature may increase by about 2º C by 2040 AD.
Volcanic dust Theories: Volcanic dust, because of the size of its particles, deflects light of short wavelengths coming from the sun. But long-wave terrestrial radiation can easily pass through volcanic dust without any loss. It is therefore, natural that large scale volcanic dust may lower down the earth’s temperature to a certain extent. The large amount of volcanic dust present in the atmosphere is possibly one of the causes of Little Ice Age. According to this theory, the ice ages are supposed to be initiated during epochs of frequent volcanic eruptions.
Recent fires in Los Angeles
In the recent past years various natural calamities are occurring in an around the world. Since January 7, 2025 a series of wildfires have been affected Los Angeles and surrounding regions. The fire is a combination of extreme heat, dry conditions, and gusty winds. These fires caused widespread destruction, forcing evacuations and threatening homes, businesses and natural habitats. Notably, several blazes broke out in the late summer and fall of 2024, prompting massive firefighting efforts.
Thousands of firefighters, including both local and out-of-state crews, have been deployed to contain the fires, but the rapidly challenging conditions have made control difficult. This fires have also worsen air quality, creating health hazards for residents. Authorities continue to battle the fires while dealing with long-term impacts on the environment, infrastructure and economy. Experts warn that California’s wildfire season is lengthening due to climate change, underscoring the need for improved prevention and mitigation strategies to safeguard communities.
The Los Angeles fires, particularly those recent years, have been increasingly linked to climate change due to rising temperature, prolonged droughts, and intensified heat waves. These conditions dry out the vegetation, making it more susceptible to ignition, while higher temperatures and erratic weather patterns contribute to longer and more intense fire seasons.