πAir parcels at the poles are dry due to extremely low temperatures reducing moisture-holding capacity, combined with subsiding high-pressure conditions and minimal evaporation
Rainfall. Warmer air can hold more water vapor: the theoretical maximum water vapor content is given by the ClausiusβClapeyron relation, which yields β7% increase in water vapor in the atmosphere per 1 Β°C warming.
Rainfall. Warmer air can hold more water vapor: the theoretical maximum water vapor content is given by the ClausiusβClapeyron relation, which yields β7% increase in water vapor in the atmosphere per 1 Β°C warming.
Forwarded from PRELIMS 2025
The Salt Range is a mountain range in the north of Punjab province of Pakistan, deriving its name from its extensive deposits of rock salt. The range extends along the south of the Potohar Plateau and the north of the Jhelum River.
πͺ΄Bahlul Lodi Pg.no 113 old ncert
πͺ΄Bahlul Lodi Pg.no 113 old ncert
Forwarded from PRELIMS 2025 (SP)
Satluj and Beas rivers confluence at Harike, also known as Hari-ke-Pattan, in the Punjab state of India
Kolleru Lake is a natural freshwater lake that is not formed by a single river, but rather it sits between the deltas of the Krishna and Godavari rivers
π΄Additionally, the lake is directly fed by the seasonal Budameru and Tammileru rivers.
Kolleru Lake is a natural freshwater lake that is not formed by a single river, but rather it sits between the deltas of the Krishna and Godavari rivers
π΄Additionally, the lake is directly fed by the seasonal Budameru and Tammileru rivers.
π΄The agarwood tree (Aquilaria malaccensis), renowned for its resinous heartwood (oud), is primarily native to the tropical forests of Northeast India, Bangladesh, Bhutan, and parts of Southeast Asia
πIndia currently has around 150 million agarwood trees, nearly 90% of which are located in the Northeastern states. Through this scheme, Tripuraβs production capacity is expected to increase by up to 50%.
π therapeutic properties in ancient Ayurvedic texts, including the Charaka Samhita. It is also mentioned in the 5th century CE poetry of Kalidasa
πAgarwood figured in Appendix II of the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES)
π€© π βBy submitting a Non-Detriment Finding, India demonstrated that agarwood trade is sustainable, thereby avoiding scrutiny under CITESβ Review of Significant Trade and enabling regulated export quotas.β
πIndia currently has around 150 million agarwood trees, nearly 90% of which are located in the Northeastern states. Through this scheme, Tripuraβs production capacity is expected to increase by up to 50%.
πAgarwood figured in Appendix II of the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES)
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The Only Ape in India: The Hoolock gibbon is the only ape found in India, specifically in the northeastern states.Species Breakdown: There are two main types of Hoolock gibbons:Western Hoolock Gibbon (Hoolock hoolock): Found west of the Dibang River.Eastern Hoolock Gibbon (Hoolock leuconedys): Found in Arunachal Pradesh and parts of Assam.
πhe Hollong Forest (often referred to as Hollong Tourist Lodge area) is located deep inside the Jaldapara National Park in the Alipurduar district of West Bengal, India. It is renowned for its dense forest, the Hollong River, and as a prime spot for viewing one-horned rhinoceroses and elephants in their natural habitat
πhe Hollong Forest (often referred to as Hollong Tourist Lodge area) is located deep inside the Jaldapara National Park in the Alipurduar district of West Bengal, India. It is renowned for its dense forest, the Hollong River, and as a prime spot for viewing one-horned rhinoceroses and elephants in their natural habitat
Ansupa Lake is a freshwater oxbow lake located on the left bank of the Mahanadi River near the town of Banki in Cuttack district, in the Indian state of Odisha. It is the largest freshwater lake in Odisha and one of the Ramsar wetlands of international importance in India.
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Beach sand minerals (BSMs) are a suite of seven heavy, industrially valuable minerals found in coastal sediments: ilmenite, rutile, leucoxene, zircon, garnet, sillimanite, and monazite. These minerals are concentrated by wave action and are crucial sources of titanium, zirconium, and rare earth elements, used in paints, ceramics, and aerospace, often along the Indian coast
πGuatemala is the world's largest producer and exporter of cardamom, supplying over 50% of the global market.
π Cardamom originates from the lush, evergreen forests of the Western Ghats in Southern India. Known as the "Spice Coast," this region, particularly Kerala, is the native home of green cardamom (Elettaria cardamomum). Today, while India remains a top producer, the largest exporter is Guatemala, with significant production also in Sri Lanka and Tanzania.
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π¦
Mahabaleshwar
Famous hill station in Western Ghats
Origin of Krishna River
High rainfall zone
π Trimbakeshwar
π Key Points:
One of the 12 Jyotirlingas
Located near Brahmagiri Hills
Origin of Godavari River
π Kalsubai Peak
π Key Points:
Highest peak in Maharashtra (β 1646 m)
Located in Sahyadri (Western Ghats)
Famous trekking peak
π Kudremukh
Means βhorse faceβ mountain
Located in Western Ghats
Known for:
Iron ore deposits
Kudremukh National Park
π Doddabetta
Highest peak in Nilgiri Hills
Height β 2637 m
Near Ooty
π Baba Budan Giri
Hill range in Chikkamagaluru
Famous for introduction of coffee to India
Named after Sufi saint Baba Budan
π‘ Mullayanagiri is the highest peak in Karnataka, India, located in the Chandra Dhrona Hill Ranges of the Western Ghats (Chikkamagaluru district) at an altitude of 1,930 meters (6,330 ft).
ππ’ Final Order (North β South)
π Kalsubai β Mahabaleshwar β Kudremukh β Baba Budan Giri β Doddabetta
Famous hill station in Western Ghats
Origin of Krishna River
High rainfall zone
π Trimbakeshwar
π Key Points:
One of the 12 Jyotirlingas
Located near Brahmagiri Hills
Origin of Godavari River
π Kalsubai Peak
π Key Points:
Highest peak in Maharashtra (β 1646 m)
Located in Sahyadri (Western Ghats)
Famous trekking peak
Means βhorse faceβ mountain
Located in Western Ghats
Known for:
Iron ore deposits
Kudremukh National Park
π Doddabetta
Highest peak in Nilgiri Hills
Height β 2637 m
Near Ooty
π Baba Budan Giri
Hill range in Chikkamagaluru
Famous for introduction of coffee to India
Named after Sufi saint Baba Budan
ππ’ Final Order (North β South)
π Kalsubai β Mahabaleshwar β Kudremukh β Baba Budan Giri β Doddabetta
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πThe Shencottah Gap (or Sengottai Gap) is a crucial, narrow mountain pass in the southern Western Ghats, located near the Tamil Nadu-Kerala border between Tenkasi and Kollam districts
π Situated near Sengottai (Tamil Nadu) and Aryankavu/Punalur (Kerala). It lies in the Periyar-Agastyamalai landscape, acting as a link between the Western Ghats and the Cardamom Hills.
π Situated near Sengottai (Tamil Nadu) and Aryankavu/Punalur (Kerala). It lies in the Periyar-Agastyamalai landscape, acting as a link between the Western Ghats and the Cardamom Hills.
Forwarded from GEO-P
why soils in equatorial regions are often not rich, summarized in short points:
High Rainfall and Leaching: Heavy rainfall washes away soluble nutrients like nitrogen, potassium, and calcium.
Rapid Decomposition: Warm, humid conditions break down organic matter quickly, leaving less nutrient accumulation in the soil.
ππ βDespite heavy leaching, equatorial regions support high biomass due to rapid nutrient recycling, where nutrients are quickly taken up by vegetation and remain locked in biomass rather than soil.β
Soil Erosion: Heavy rains erode topsoil, removing the most fertile layer.
Nutrient Uptake by Vegetation: Dense, fast-growing plants absorb nutrients rapidly, leaving soil nutrient-poor.
Soil Acidity: Many tropical soils are acidic, limiting nutrient availability.
Geological Factors: Soils form from ancient, highly weathered rocks, which are low in essential minerals.
Lack of Volcanic Activity: Fewer inputs of fresh, nutrient-rich minerals from volcanic activity.
High Rainfall and Leaching: Heavy rainfall washes away soluble nutrients like nitrogen, potassium, and calcium.
Rapid Decomposition: Warm, humid conditions break down organic matter quickly, leaving less nutrient accumulation in the soil.
ππ βDespite heavy leaching, equatorial regions support high biomass due to rapid nutrient recycling, where nutrients are quickly taken up by vegetation and remain locked in biomass rather than soil.β
Soil Erosion: Heavy rains erode topsoil, removing the most fertile layer.
Nutrient Uptake by Vegetation: Dense, fast-growing plants absorb nutrients rapidly, leaving soil nutrient-poor.
Soil Acidity: Many tropical soils are acidic, limiting nutrient availability.
Geological Factors: Soils form from ancient, highly weathered rocks, which are low in essential minerals.
Lack of Volcanic Activity: Fewer inputs of fresh, nutrient-rich minerals from volcanic activity.
π βIn coniferous forests, acidic organic compounds act as chelating agents, mobilizing iron and aluminium and leading to their downward leaching, a key process in podzolization.β
π Indiaβs Adani Power Ltd. built a large coal power plant at Mundra (Gujarat) using advanced βsupercriticalβ technology.
π This project was registered under the UNβs climate mechanism (CDM) and could earn carbon credits because it emits less COβ than older plants.
π΅ 1) What is the CDM?
π Clean Development Mechanism under UNFCCC
Allows developing countries to run projects that reduce emissions
In return, they get carbon credits (CERs)
These credits can be sold to developed countries
π»3) Why Mundra project got CDM status?
π The Mundra Thermal Power Station used supercritical tech instead of older tech.
So compared to a βbaselineβ (subcritical plant), it:
Burns less coal
Emits less COβ
π That difference = emission reduction β eligible for carbon credits
π’ 4) What are carbon credits?
π 1 credit β 1 tonne of COβ reduced
If plant emits less than baseline
It earns credits
Can sell credits in carbon market
π This project was registered under the UNβs climate mechanism (CDM) and could earn carbon credits because it emits less COβ than older plants.
π΅ 1) What is the CDM?
π Clean Development Mechanism under UNFCCC
Allows developing countries to run projects that reduce emissions
In return, they get carbon credits (CERs)
These credits can be sold to developed countries
π»3) Why Mundra project got CDM status?
π The Mundra Thermal Power Station used supercritical tech instead of older tech.
So compared to a βbaselineβ (subcritical plant), it:
Burns less coal
Emits less COβ
π That difference = emission reduction β eligible for carbon credits
π’ 4) What are carbon credits?
π 1 credit β 1 tonne of COβ reduced
If plant emits less than baseline
It earns credits
Can sell credits in carbon market
ain sources of sulfur emissions (SOβ) in India
Coal-based thermal power plants (largest share)
Oil refineries & diesel/petrol use
Industries (cement, smelters, brick kilns)
π Key point: When fuel contains sulfur, burning it releases SOβ (sulfur dioxide).
Coal-based thermal power plants (largest share)
Oil refineries & diesel/petrol use
Industries (cement, smelters, brick kilns)
π Key point: When fuel contains sulfur, burning it releases SOβ (sulfur dioxide).
Step 1: What is terrestrial radiation?
π Earth absorbs sunlight and re-emits energy as infrared (longwave) radiation.
π This heat naturally wants to go out to space.
π π Cirrus clouds:
Contain many tiny ice crystals
These:
Absorb outgoing infrared
Re-emit it back downward
π Result:
π Heat gets trapped (warming effect)
π΅ Step 3: What CCT changes
π CCT introduces particles β forms fewer but larger ice crystals
Effect:
Large crystals:
Fall quickly (gravity)
Cloud becomes thinner & shorter-lived
π΄ Step 4: How heat escapes
π With thinner / disappearing cirrus:
βοΈ Less absorption of infrared
βοΈ Less back-radiation to Earth
π So:
β‘οΈ More terrestrial radiation escapes directly to space
π― π βCirrus Cloud Thinning enhances the escape of terrestrial radiation by reducing the density and lifetime of cirrus clouds, thereby decreasing their ability to absorb and re-emit infrared radiation back to Earth.β
π Earth absorbs sunlight and re-emits energy as infrared (longwave) radiation.
π This heat naturally wants to go out to space.
Contain many tiny ice crystals
These:
Absorb outgoing infrared
Re-emit it back downward
π Result:
π Heat gets trapped (warming effect)
π΅ Step 3: What CCT changes
π CCT introduces particles β forms fewer but larger ice crystals
Effect:
Large crystals:
Fall quickly (gravity)
Cloud becomes thinner & shorter-lived
π΄ Step 4: How heat escapes
π With thinner / disappearing cirrus:
βοΈ Less absorption of infrared
βοΈ Less back-radiation to Earth
π So:
β‘οΈ More terrestrial radiation escapes directly to space
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