TRISHNA Mission
Why in News: The Indian Space Research Organization (ISRO) recently revealed a new satellite mission called TRISHNA.
About TRISHNA
TRISHNA: Thermal Infra-Red Imaging Satellite for High-Resolution Natural Resource Assessment.
Objectives:
- Monitor surface temperature and water management globally.
- Address extreme heat issues in India and Europe.
Launch Details:
- Tentative Launch: 2025.
- Mission Lifespan: 5 years.
Features:
- TIR Payload: Provided by the French space agency CNES. It features a four-channel long-wavelength infrared imaging sensor for high-resolution surface temperature analysis and mapping heat radiated back from land.
- VNIR-SWIR Payload: Developed by ISRO. It maps the reflectivity (albedo) of the Earth’s surface across seven bands, measures the amount of heat reflecting off the Earth’s surface, and calculates biophysical and radiation budget variables.
UNESCO’s State of Ocean Report
Why in News: The report states that ocean warming has sped up, with the rate doubling to 0.66 ± 0.10 W/m2 over the past two decades.
Key Highlights of the Report:
- Rising Ocean Temperature: From 1960 to 2023, the upper 2,000 meters of oceans warmed at a rate of 0.32 ± 0.03 watts per square meter (W/m²).
- Increased Ocean Heat: Oceans absorb approximately 90% of the Earth’s energy imbalance (EEI), leading to a cumulative increase in ocean heat content (OHC) in the upper 2,000 meters of the water column. OHC represents the total heat stored by the ocean.
- Impact of OHC: Increased OHC restricts ocean layers from mixing or deoxygenating, lowering the preformed oxygen content of near-surface high-latitude waters reaching deeper layers. While it remains uncertain if deoxygenation is accelerating, it can negatively affect coastal and large marine ecosystems.
- Average Increase in Ocean Acidification: The average global surface ocean pH has decreased continuously by 0.017-0.027 pH units per decade in the open ocean since the late 1980s.
- Inadequate Data: In 2024, only 638 stations recorded ocean pH levels, resulting in inadequate current coverage and time series data that are not long enough to determine trends. Observations in all areas are lacking.
- Other Sources of Acidification: Coastal waters can become acidic due to natural processes like freshwater influx, biological activity, temperature fluctuations, and climate patterns such as El Niño/Southern Oscillation (ENSO).
- Sea Level Rise: Global mean sea level from 1993 to 2023 rose at a rate of 3.4 ± 0.3 mm per year.
- Recommendation: There is a need to improve space-based and in-situ observing systems for monitoring sea-level rise on global, regional, and coastal scales.
Senkaku Island
Why in News: On June 7, 2024, Japan voiced its protest to Beijing after four armed Chinese coastguard vessels entered the waters surrounding the Senkaku Islands, which Tokyo claims as its territory.
About Senkaku Island Dispute:
The Senkaku Islands dispute, also known as the Diaoyu Islands dispute, involves competing claims over a group of uninhabited islands:
- Japan refers to them as the Senkaku Islands,
- China as the Diaoyu Islands,
- Taiwan as the Tiaoyutai Islands.
Ownership Claim: Both Japan and China assert sovereignty over these islands.
- Location: Situated in the East China Sea, the Senkaku Islands lie between Japan, China, and Taiwan.
- Geography: The Senkaku chain comprises five main islets – Uotsuri, Kuba, Taisho, Kitakojima, and Minamikojima – along with three rocks – Tobise, Okinokitaiwa, and Okinominamiiwa.
- Strategic Importance: These islands are strategically positioned near major shipping lanes, have rich fishing grounds, and are believed to hold potential oil resources.
Historical Incorporation:
Japan incorporated the islands in January 1895, citing no prior control by any other state at that time.
- Post-World War II: The San Francisco Peace Treaty placed the islands under U.S. administration as part of Okinawa, reaffirming their status as Japanese territory.
Chinese Claim:
- China asserts that the Diaoyu Islands are its inherent territory based on historical, geographical, and legal evidence.
- Historical administration traces back to the Ming and Qing dynasties, administered as part of Taiwan.
Section 436-A of CrPC
Why in News: The Delhi High Court approved bail for Sharjeel Imam in the case where he faced allegations of sedition and violations under the Unlawful Activities (Prevention) Act.
Bail Under Section 436-A of CrPC
Statutory Grounds for Bail
- Section 436-A of CrPC: This provision mandates bail for undertrials who have spent more than half of the maximum sentence for their offense in jail, except when the crime is punishable by death.
- Introduced in 2005: Aimed at alleviating prison overcrowding and expediting trials for lesser offenses.
Impact of Section 436-A
- Undertrial Relief: Particularly beneficial for undertrials charged with offenses carrying shorter sentences. For instance, in 2022, National Crime Records Bureau data showed 63,502 undertrials charged with sentences of less than two years.
- Other Protections for Undertrials
Bailable Offenses
- Section 436 CrPC: Courts must grant bail for bailable offenses if the accused is willing to furnish a bail bond.
Court Discretion: Granting bail for non-bailable offenses is at the court’s discretion.
Bail Under Section 436-A of CrPC
Statutory Grounds for Bail
- Section 436-A of CrPC: This provision mandates bail for undertrials who have spent more than half of the maximum sentence for their offense in jail, except when the crime is punishable by death.
- Introduced in 2005: Aimed at alleviating prison overcrowding and expediting trials for lesser offenses.
Impact of Section 436-A
- Undertrial Relief: Particularly beneficial for undertrials charged with offenses carrying shorter sentences. For instance, in 2022, National Crime Records Bureau data showed 63,502 undertrials charged with sentences of less than two years.
Other Protections for Undertrials
- Bailable Offences
- Section 436 CrPC: Courts must grant bail for bailable offenses if the accused is willing to furnish a bail bond.
- Non-Bailable Offences
- Court Discretion: Granting bail for non-bailable offenses is at the court’s discretion.
- Default Bail
- Section 167(2) of CrPC: Police have a specific timeline to complete the investigation and file a report. Default bail applies if they fail to meet this deadline. This rule only applies to crimes under the Indian Penal Code.
- Special Legislations: Stringent laws like the UAPA have specific timelines for police investigations, often limiting the applicability of default bail.
Default Bail
- Section 167(2) of CrPC: Police have a specific timeline to complete the investigation and file a report. Default bail applies if they fail to meet this deadline. This rule only applies to crimes under the Indian Penal Code.
- Special Legislations: Stringent laws like the UAPA have specific timelines for police investigations, often limiting the applicability of default bail.