Rajesh Agnihotri
Biographic Data
| ID | 3646096 |
|---|---|
| NAME | Rajesh Agnihotri |
| GIVEN NAMES | Rajesh |
| FAMILY NAME | Agnihotri |
| SIGNATURE | AGNIHOTRI R |
| AFFILIATIONS | Birbal Sahni Institute of Palaeosciences |
| ORCID | 0000-0003-2069-0734 |
| VERIFIED | Yes |
| TOTAL WORKS | 16 |
| TOTAL CITATIONS | 7 |
| AUTHOR COUNT | 16 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 2003 |
| LATEST PUBLICATION YEAR | 2026 |
| H-INDEX | 1 |
Late Holocene geochemical and environmental changes inferred from a multiproxy investigation in sediments from Kondagai Lake Tamil Nadu, India
Climatic crises have been increasing rapidly since the late Holocene worldwide. Strategic planning needs multi-proxy records to understand the rate of ecosystem and climatic perturbations for generating mitigation maps. We present multiproxy records with isotopic composition (δ 13 C TOC , δ 15 N Bulk ), total organic carbon (TOC%), total nitrogen (TN%), total organic carbon to total nitrogen (C/N) ratio, palynofacies and grain size analysis of an…
Paleolimnology and Natural Versus Anthropogenic Influx During the Late Holocene from Vembanad Wetland, Ramsar Site, Kerala, India
A multi-proxy study of diatoms, palynofacies, and grain size was conducted on a 100 cm core from Arookutty, Vembanad wetland, Kerala, India, to reconstruct paleolimnological changes during the late Holocene, with a focus on natural versus anthropogenic influences. Four distinct depositional phases, from ca. 500 BCE to ca. 400 CE, were identified, aligning with the Roman Warm Period (RWP). The period from ca. 500 BCE to ca. 450 BCE shows high fres…
Was LIA synchronous with equa-tropical climate? A multiproxy study from the southwest coast of India
Presence and implications of petrogenic organic carbon in High Himalayan Crystalline lake sediment
Twelve lacustrine sediment samples from a relict lake in the Kalla Glacier valley were co-dated using AMS radiocarbon ( 14 C) and infrared stimulated luminescence (IRSL) dating methods. In general, the radiocarbon ages of bulk organic matter were older by a minimum of 1500 years compared to (age depth) modeled luminescence ages after fading corrections. This is observed for the first time in the lake sediments of High Himalayan Crystalline zone. …
Royal burials and chariots from Sinauli (Uttar Pradesh, India)
For the first time in the Indian subcontinent, a series of royal burials with chariots have been recovered from the Chalcolithic period at the archaeological site Sinauli (29°8′28′′N; 77°13′1′′E), Baghpat district, western Uttar Pradesh, India. Eight burials were excavated from the site; among them a royal burial with copper decorated legged coffin (lid with a series of anthropomorphic figures) and headgear has also been recovered. Among these re…
Agricultural resilience and land-use from an Indus settlement in north-western India
Monitoring hydroecology and climatic variability since ~4.6 ka from palynological, sedimentological and environmental perspectives in an Ox-bow lake, Central Ganga Plain, India
The Ganga-Sai River Interfluve contains several ox-bow lakes in the fertile Central Ganga plains (CGP). A ~2.20-meter deep sedimentary profile obtained near the Chandra Shekhar Azad bird sanctuary (Nawabganj lake-NL) of the CGP was studied to understand the evolution of the ecosystem and climate using pollen/spores, diatoms, testate amoebae, environmental magnetic data,and carbon and nitrogen isotopes. This sedimentary profile is chronologically …
Late-Holocene wildfire record from the Stagmo peat section, Leh valley, NW Himalaya
Wildfire is an integral component of the terrestrial ecosystem that plays a significant role in regulating the vegetation cover. The paleofire records stored in lacustrine, peat, or marine sedimentary deposits along with environmental proxy records provide temporal information on fire activity and contemporary climatic conditions on a regional scale. A ~2.8m long peat sedimentary profile from Stagmo, Indus Valley, Ladakh Himalaya was examined for…
New Chronology for Megalithic Burials in Vidarbha (Central India)
Megalithic cultures of central India provide important links between the southern Neolithic-Chalcolithic cultures and the early Historical period (∼500 BC to ∼AD 700) and reveal knowledge of ancient traditions of early inhabitants. Scientific dating of these Megalithic burial sites is a challenging task due to scarcity of dateable material and alterations. Here, we present multiple accelerator mass spectrometry radiocarbon (AMS 14 C) dates from e…
A new chronology based on OSL and radiocarbon dating for the archaeological settlements of Vadnagar (western India) along with magnetic and isotopic imprints of cultural sediments
Environmental magnetic, Geochemical and Sulfur isotopic imprints of an Indus archaeological site 4MSR from western India (Rajasthan)
High-resolution climatic (monsoonal) variability reconstructed from a continuous ~2700-year sediment record from Northwest Himalaya (Ladakh)
A chronologically well-constrained sedimentary archive from Upshi (Ladakh) was studied using a multi-proxy approach namely palynology, environmental magnetism, total organic carbon (TOC), total nitrogen (TN), stable isotopes of carbon and nitrogen providing a continuous vegetation, and paleoenvironmental history spanning the last ~2700 years with a temporal resolution of ~43 years. Pollen assemblage shows non-arboreal pollen (NAP) and non-pollen …
Decadal Variations in Oceanic Properties of the Arabian Sea Water Column since Geosecs
This article reports temporal changes in the measured oceanic geochemical properties of the Arabian Sea and the equatorial Indian Ocean by reoccupying six stations investigated during the GEOSECS expedition in 1977 and 1978. Observed differences are interpreted in terms of plausible changes in the environment and climate that have occurred in response to natural or anthropogenic processes. The depth profiles of major parameters such as dissolved …
Early holocene monsoonal fluctuations in the Garhwal higher Himalaya as inferred from multi-proxy data from the Malari paleolake
A 4.9-m-thick lake sequence, formed due to the landslide damming of a stream in the semiarid Garhwal Himalaya, was studied to understand past monsoonal variations in the region. The Optically Stimulated Luminescence (OSL) chronology indicates that the lake existed between ~ 12 and ~ 7 ka ago. Chronologically constrained trends of sand percent, organic phosphorus (OP), apatite inorganic phosphorus (AIP) and parameters of environmental magnetism we…
Variability of subsurface denitrification and surface productivity in the coastal eastern Arabian Sea over the past seven centuries
Temporal variations over the last ~700 years in surface productivity and subsurface denitrification in the coastal eastern Arabian Sea (off Goa), a hydrographically unique environment that experiences seasonal near-bottom anoxia, have been investigated using multiple geochemical and isotopic proxies. The results suggest that surface productivity was much lower than it is today during all major solar minima during this period, but subsurface denit…
Changes in surface productivity and subsurface denitrification during the Holocene
Spatial and temporal variations in the intensity of subsurface denitrification in the water-column of the eastem Arabian Sea have been investigated using chemical and isotopic proxies. The data show a steady increase in the denitrification intensity from ∼10 ka to ∼2 ka BP, probably caused by changes in surface productivity fuelled by strengthening of upwelling (monsoonal intensity). In addition, changes in redox conditions and detrital material …
Variability of subsurface denitrification and surface productivity in the coastal eastern Arabian Sea over the past seven centuries
Temporal variations over the last ~700 years in surface productivity and subsurface denitrification in the coastal eastern Arabian Sea (off Goa), a hydrographically unique environment that experiences seasonal near-bottom anoxia, have been investigated using multiple geochemical and isotopic proxies. The results suggest that surface productivity was much lower than it is today during all major solar minima during this period, but subsurface denit…
Royal burials and chariots from Sinauli (Uttar Pradesh, India)
For the first time in the Indian subcontinent, a series of royal burials with chariots have been recovered from the Chalcolithic period at the archaeological site Sinauli (29°8′28′′N; 77°13′1′′E), Baghpat district, western Uttar Pradesh, India. Eight burials were excavated from the site; among them a royal burial with copper decorated legged coffin (lid with a series of anthropomorphic figures) and headgear has also been recovered. Among these re…
High-resolution climatic (monsoonal) variability reconstructed from a continuous ~2700-year sediment record from Northwest Himalaya (Ladakh)
A chronologically well-constrained sedimentary archive from Upshi (Ladakh) was studied using a multi-proxy approach namely palynology, environmental magnetism, total organic carbon (TOC), total nitrogen (TN), stable isotopes of carbon and nitrogen providing a continuous vegetation, and paleoenvironmental history spanning the last ~2700 years with a temporal resolution of ~43 years. Pollen assemblage shows non-arboreal pollen (NAP) and non-pollen …
Changes in surface productivity and subsurface denitrification during the Holocene
Spatial and temporal variations in the intensity of subsurface denitrification in the water-column of the eastem Arabian Sea have been investigated using chemical and isotopic proxies. The data show a steady increase in the denitrification intensity from ∼10 ka to ∼2 ka BP, probably caused by changes in surface productivity fuelled by strengthening of upwelling (monsoonal intensity). In addition, changes in redox conditions and detrital material …
Changes in surface productivity and subsurface denitrification during the Holocene
Spatial and temporal variations in the intensity of subsurface denitrification in the water-column of the eastem Arabian Sea have been investigated using chemical and isotopic proxies. The data show a steady increase in the denitrification intensity from ∼10 ka to ∼2 ka BP, probably caused by changes in surface productivity fuelled by strengthening of upwelling (monsoonal intensity). In addition, changes in redox conditions and detrital material …
Variability of subsurface denitrification and surface productivity in the coastal eastern Arabian Sea over the past seven centuries
Temporal variations over the last ~700 years in surface productivity and subsurface denitrification in the coastal eastern Arabian Sea (off Goa), a hydrographically unique environment that experiences seasonal near-bottom anoxia, have been investigated using multiple geochemical and isotopic proxies. The results suggest that surface productivity was much lower than it is today during all major solar minima during this period, but subsurface denit…
Early holocene monsoonal fluctuations in the Garhwal higher Himalaya as inferred from multi-proxy data from the Malari paleolake
A 4.9-m-thick lake sequence, formed due to the landslide damming of a stream in the semiarid Garhwal Himalaya, was studied to understand past monsoonal variations in the region. The Optically Stimulated Luminescence (OSL) chronology indicates that the lake existed between ~ 12 and ~ 7 ka ago. Chronologically constrained trends of sand percent, organic phosphorus (OP), apatite inorganic phosphorus (AIP) and parameters of environmental magnetism we…
Decadal Variations in Oceanic Properties of the Arabian Sea Water Column since Geosecs
This article reports temporal changes in the measured oceanic geochemical properties of the Arabian Sea and the equatorial Indian Ocean by reoccupying six stations investigated during the GEOSECS expedition in 1977 and 1978. Observed differences are interpreted in terms of plausible changes in the environment and climate that have occurred in response to natural or anthropogenic processes. The depth profiles of major parameters such as dissolved …
High-resolution climatic (monsoonal) variability reconstructed from a continuous ~2700-year sediment record from Northwest Himalaya (Ladakh)
A chronologically well-constrained sedimentary archive from Upshi (Ladakh) was studied using a multi-proxy approach namely palynology, environmental magnetism, total organic carbon (TOC), total nitrogen (TN), stable isotopes of carbon and nitrogen providing a continuous vegetation, and paleoenvironmental history spanning the last ~2700 years with a temporal resolution of ~43 years. Pollen assemblage shows non-arboreal pollen (NAP) and non-pollen …
Environmental magnetic, Geochemical and Sulfur isotopic imprints of an Indus archaeological site 4MSR from western India (Rajasthan)
A new chronology based on OSL and radiocarbon dating for the archaeological settlements of Vadnagar (western India) along with magnetic and isotopic imprints of cultural sediments
New Chronology for Megalithic Burials in Vidarbha (Central India)
Megalithic cultures of central India provide important links between the southern Neolithic-Chalcolithic cultures and the early Historical period (∼500 BC to ∼AD 700) and reveal knowledge of ancient traditions of early inhabitants. Scientific dating of these Megalithic burial sites is a challenging task due to scarcity of dateable material and alterations. Here, we present multiple accelerator mass spectrometry radiocarbon (AMS 14 C) dates from e…
Monitoring hydroecology and climatic variability since ~4.6 ka from palynological, sedimentological and environmental perspectives in an Ox-bow lake, Central Ganga Plain, India
The Ganga-Sai River Interfluve contains several ox-bow lakes in the fertile Central Ganga plains (CGP). A ~2.20-meter deep sedimentary profile obtained near the Chandra Shekhar Azad bird sanctuary (Nawabganj lake-NL) of the CGP was studied to understand the evolution of the ecosystem and climate using pollen/spores, diatoms, testate amoebae, environmental magnetic data,and carbon and nitrogen isotopes. This sedimentary profile is chronologically …
Late-Holocene wildfire record from the Stagmo peat section, Leh valley, NW Himalaya
Wildfire is an integral component of the terrestrial ecosystem that plays a significant role in regulating the vegetation cover. The paleofire records stored in lacustrine, peat, or marine sedimentary deposits along with environmental proxy records provide temporal information on fire activity and contemporary climatic conditions on a regional scale. A ~2.8m long peat sedimentary profile from Stagmo, Indus Valley, Ladakh Himalaya was examined for…
Was LIA synchronous with equa-tropical climate? A multiproxy study from the southwest coast of India
Presence and implications of petrogenic organic carbon in High Himalayan Crystalline lake sediment
Twelve lacustrine sediment samples from a relict lake in the Kalla Glacier valley were co-dated using AMS radiocarbon ( 14 C) and infrared stimulated luminescence (IRSL) dating methods. In general, the radiocarbon ages of bulk organic matter were older by a minimum of 1500 years compared to (age depth) modeled luminescence ages after fading corrections. This is observed for the first time in the lake sediments of High Himalayan Crystalline zone. …
Royal burials and chariots from Sinauli (Uttar Pradesh, India)
For the first time in the Indian subcontinent, a series of royal burials with chariots have been recovered from the Chalcolithic period at the archaeological site Sinauli (29°8′28′′N; 77°13′1′′E), Baghpat district, western Uttar Pradesh, India. Eight burials were excavated from the site; among them a royal burial with copper decorated legged coffin (lid with a series of anthropomorphic figures) and headgear has also been recovered. Among these re…
Agricultural resilience and land-use from an Indus settlement in north-western India
Paleolimnology and Natural Versus Anthropogenic Influx During the Late Holocene from Vembanad Wetland, Ramsar Site, Kerala, India
A multi-proxy study of diatoms, palynofacies, and grain size was conducted on a 100 cm core from Arookutty, Vembanad wetland, Kerala, India, to reconstruct paleolimnological changes during the late Holocene, with a focus on natural versus anthropogenic influences. Four distinct depositional phases, from ca. 500 BCE to ca. 400 CE, were identified, aligning with the Roman Warm Period (RWP). The period from ca. 500 BCE to ca. 450 BCE shows high fres…
Late Holocene geochemical and environmental changes inferred from a multiproxy investigation in sediments from Kondagai Lake Tamil Nadu, India
Climatic crises have been increasing rapidly since the late Holocene worldwide. Strategic planning needs multi-proxy records to understand the rate of ecosystem and climatic perturbations for generating mitigation maps. We present multiproxy records with isotopic composition (δ 13 C TOC , δ 15 N Bulk ), total organic carbon (TOC%), total nitrogen (TN%), total organic carbon to total nitrogen (C/N) ratio, palynofacies and grain size analysis of an…
Geology (14 works) · Geology and Paleoclimatology Research (12 works) · Oceanography (11 works) · Geography (9 works) · Holocene (8 works) · Archaeology and ancient environmental studies (7 works) · Ecology (7 works) · Archaeology (6 works) · Environmental Science (6 works) · Paleontology (6 works)