Chaochao Gao

Chaochao Gao
Zhejiang University | ZJU · Department of Environmental Science

Ph. D

About

54
Publications
12,696
Reads
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1,762
Citations
Citations since 2017
31 Research Items
998 Citations
2017201820192020202120222023050100150200250
2017201820192020202120222023050100150200250
2017201820192020202120222023050100150200250
2017201820192020202120222023050100150200250
Additional affiliations
September 2011 - present
Zhejiang University
Position
  • Professor (Associate)
September 2010 - September 2011
State Univeristy of New York
Position
  • Professor (Assistant)
August 2008 - December 2008
North Carolina State University
Position
  • Lecturer

Publications

Publications (54)
Article
Full-text available
Paleoclimate evidence suggests that tropical volcanic eruptions could increase the likelihood of El Niño occurrence. Previous numerical model studies with zonally uniform volcanic aerosol forcing suggested the roles of land cooling-induced monsoon suppression and ocean cooling-induced air-sea interaction in triggering an El Niño following the erupt...
Article
Nature-based climate solutions are playing an increasingly significant role under the long-term goal of carbon-neutrality. Carbon storage and sequestration are important service functions of the ecosystem, but these potential in neutralizing carbon emissions at provincial level is rarely evaluated. Here we take Qinghai province in northwest China t...
Article
Full-text available
The Pacific decadal oscillation (PDO) is the leading mode of decadal climate variability over the North Pacific. However, it remains unknown to what extent external forcings can influence the PDO’s periodicity and magnitude over the past 2000 years. We show that the paleo-assimilation products (LMR) and proxy data suggest a 20–40 year PDO occurred...
Article
Full-text available
Extreme East Asian summer monsoon (EASM) rainfall frequently induces floods that threaten millions of people, and has been generally attributed to internal climate variability. In contrast to the hydrological weakening theory of volcanic eruptions, here we present convergent empirical and modeling evidence for significant intensification of EASM ra...
Article
Full-text available
The climatic consequences of large volcanic eruptions depend on the direct radiative perturbation and the climate variability that amplifies or dampens the initial perturbation. Potential climate responses to future eruptions, however, have been rarely studied. Here we show perturbation of Tambora- size causes significant but no inter-scenario diff...
Article
Full-text available
The mid-17th century is characterized by a cluster of explosive volcanic eruptions in the 1630s and 1640s, climatic conditions culminating in the Maunder Minimum, and political instability and famine in regions of western and northern Europe as well as China and Japan. This contribution investigates the sources of the eruptions of the 1630s and 164...
Article
Full-text available
An undersea volcano at Hunga Tonga-Hunga Ha'apai (HTHH) near the South Pacific island nation of Tonga, erupted violently on 15 January 2022. Potential climate impact of the HTHH volcanic eruption is of great concern to the public; here, we intend to size up the impact of the HTHH eruption from a historical perspective. The influence of historical v...
Preprint
Full-text available
The mid-17th century is characterized by a cluster of explosive volcanic eruptions in the 1630s and 1640s, deteriorating climatic conditions culminating in the Maunder Minimum as well as political instability and famine in regions of Western and Northern Europe as well as China and Japan. This contribution investigates the sources of the eruptions...
Preprint
Full-text available
Extreme East Asian summer monsoon (EASM) rainfall frequently induces floods that pose threats to millions of people across East Asia. The intensified EASM rainfall has been generally attributed to internal modes of climate variability, while external volcanic forcing has been suggested to suppress the EASM. In contrast to the hydrological weakening...
Article
Full-text available
State or societal collapses are often described as featuring rapid reductions in socioeconomic complexity, population loss or displacement, and/or political discontinuity, with climate thought to contribute mainly by disrupting a society’s agroecological base. Here we use a state-of-the-art multi-ice-core reconstruction of explosive volcanism, repr...
Preprint
Full-text available
Volcanic radiative forcing reconstruction is an important part of paleoclimate simulation and attribution efforts, and the conversion factor used to transfer ice core-based sulfate observation into stratospheric volcanic aerosol loading (LTD factor) is critical for such reconstruction. A Pinatubo-based LTD combing observations of nuclear tomb test...
Article
Economic development usually means energy demand, which in turn causes carbon emissions. For countries and enterprises, achieving emission reduction targets in the process of economic growth, meaning a decoupling between carbon emissions and economic growth, is the best developing path under low-carbon economy. China has pledged at the 75th session...
Article
Arctic is warming at an alarming speed causing accelerated melting of Greenland and rising of sea level, and geoengineering by injecting aerosol into stratosphere (SAI) has been proposed as a backup approach to mitigate warming. However, studies suggest that SAI implementation may have adverse impacts on global especially monsoon precipitation, and...
Article
Biochar application into the soils has been reported to have huge carbon sequestration potential, although it remains unclear that how the biochar aging in the soil affects its mechanical properties and soil CO2 and N2O emissions. This work assessed the impact of soil biochar aging on its physicochemical properties, microbiota community in the bioc...
Article
Full-text available
After each of the 1963 Agung, 1982 El Chichón, and 1991 Pinatubo eruptions, an El Niño was observed. The increased likelihood of an El Niño after a tropical eruption has also been found in long-term reconstructed proxy data. Through examining simulations over the last millennium by 11 different models, we show that a tropical volcano eruption can r...
Article
In the third column of the five row of Table 1, “120.4°W” should be “20.4°E”.
Article
Full-text available
Stratospheric aerosol injection (SAI) is considered as a backup approach to mitigate global warming, and understanding its climate impact is of great societal concern. It remains unclear how differently global monsoon (GM) precipitation would change in response to tropical and Arctic SAI. Using the Community Earth System Model, a control experiment...
Article
Full-text available
Proxy‐model comparisons show large discrepancies in the impact of volcanic aerosols on the hydrology of the Asian monsoon region (AMR). This was mostly imputed to uncertainties arising from the use of a single model in previous studies. Here we compare two groups of CMIP5 multimodel ensemble mean (MMEM) with the tree‐ring‐based reconstruction Monso...
Article
“Nature based solutions” has been proposed at COP25 as an important venture for combating anthropogenic climate change, and soil biochar amendment have been proposed to have vast carbon sequestration potential. On the other hand, biochar carbon storage in soils is confronted with both biochar and soil carbon and nitrogen loss. The superposition of...
Article
Full-text available
The Taal Volcano in Luzon is one of the most active and dangerous volcanoes of the Philippines. A recent eruption occurred on 12 January 2020 (Fig. 1a), and this volcano is still active with the occurrence of volcanic earthquakes. The erup- tion has become a deep concern worldwide, not only for its damage on local society, but also for potential ha...
Article
China’s Five-Year Strategic Plan for National Economic and Social Development (FYP) sets up development goals, main tasks, and policy measures to regulate or facilitate the development of the relevant industries for the next five-year, and therefore play a critical role in achieving the national goal of carbon dioxide emission control. This study a...
Article
Full-text available
The impact of northern high-latitude volcanic (NHV) eruptions on El Niño/Southern Oscillation (ENSO) are investigated based on ensemble simulations with the Community Earth System Model. The seasonality of atmospheric circulation influences the NHV aerosol dispersion, causing the stronger (weaker) Northern Hemisphere cooling after the January and A...
Article
A multiproxy study of the climatic impact after the 1815 Tambora eruption in China found substantial discrepancies among the historical documents, proxy reconstructions, and model simulations. To understand whether the discrepancies are associated with regional-scale heterogeneous hydroclimate responses or the specialty of an individual volcanic ev...
Article
Urbanization directly drives rural to urban population migration and indirectly causes west to east migration in China, two phenomena that may significantly impact China's greenhouse gas emissions given its huge population and vast difference between the west rural and east urban areas. We analyzed these two phenomena by turning emissions into a pe...
Article
The climatic aftermath of the 1815 Tambora eruption in Europe suggests that large volcanic eruptions can introduce environmental and societal consequences in this region. Here, we analyse the European summer hydrological response to 31 tropical and 44 Northern Hemisphere mid-to-high latitude eruptions over the past nine centuries, using a newly pub...
Article
The 1815 eruption of the Tambora volcano led to the “Year without a Summer” and caused serious crop failure and famines in 1816 across Europe and North America. However, few reports are available on Tambora’s influence in China despite the region’s susceptibility to monsoonal volcanic perturbation. This study presents a systemic analysis of the cli...
Article
As the world's top carbon dioxide emitter, China is expected to reach its emissions peak by 2030. East and south coastal China contribute nearly one-third of the emissions in China, and therefore play a critical role in achieving the national goal of emission control. This study analyzes the driving forces of east and south coastal China's energy-r...
Article
Chronologically-secure volcanic event histories are important for improving our understanding of volcano-climate responses, and securing ice core chronologies. We present an exploratory case-study that attempts to reconcile the chemical fingerprints of major volcanism in Greenland ice-cores for the years 670–730 CE. This period experienced consider...
Article
Full-text available
Geoengineering (also called climate engineering), which refers to large-scale intervention in the Earth's climate system to counteract greenhouse gas-induced warming, has been one of the most rapidly growing areas of climate research as a potential option for tackling global warming. Here, we provide an overview of the scientific background and res...
Article
Full-text available
China is the world's most populous country with only 7% of the world's arable land. Accurate assessment of the effect that future climate change may pose on grain production is essential to the sustainability of agriculture. Model variations plus uncertainties in the future climate change scenarios create a big challenge for such evaluation. In thi...
Article
Studies linking public perceptions on climate change and their willingness to take actions in reducing carbon emissions commonly found "value-action gap" that hinge the movement towards low-carbon society. College students, a unique group who will soon become the leaders and possibly decision makers in the society but are still under collective edu...
Article
Full-text available
The effect of volcanic aerosols on China's monsoon precipitation over the past 700 years has been studied using two independently compiled histories of volcanism combined with the Monsoon Asia Drought Atlas. For both reconstructions, four categories of eruptions are distinguished based on the character of their Northern Hemisphere (NH) injection, t...
Article
Full-text available
A new Greenland temperature record reconstructed from argon and nitrogen isotopes from trapped air in a GISP2 ice core, provides high-resolution (<20 yr) and precise annual average temperature estimates for the past 4000 yr. Due to tight age-controls and abundant paleoclimatic information from the ice core, the temperature record provides an except...
Article
Full-text available
Precise understanding of Greenland temperature variability is important in two ways. First, Greenland ice sheet melting associated with rising temperature is a major global sea level forcing, potentially affecting large populations in coming centuries. Second, Greenland temperatures are highly affected by North Atlantic Oscillation/Arctic Oscillati...
Article
To understand the nature and cause of natural climate variability, it is important to possess an accurate estimate of past climate forcings. Direct measurements that are reliable only exist for the past few decades. Therefore knowledge of prior variations has to be established based on indirect information derived from natural archives. The challen...
Conference Paper
Accurate evaluation and prediction of the potential impact of climate change on crop production is essential to the sustainable development of a country's agriculture. Model variations plus uncertainties in the future climate change scenarios create a big challenge for such evaluation. In this work, we developed a statistical crop model using the h...
Article
We combined 33 ice core records, 13 from the Northern Hemisphere and 20 from the Southern Hemisphere, to determine the timing and magnitude of the great Kuwae eruption in the mid-15th century. We extracted volcanic deposition signals by applying a high-pass loess filter to the time series and examining peaks that exceed twice the 31 year running me...
Article
Full-text available
Understanding natural causes of climate change is vital to evaluate the relative impacts of human pollution and land surface modification on climate. We have investigated one of the most important natural causes of climate change, volcanic eruptions, by using 54 ice core records from both the Arctic and Antarctica. Our recently collected suite of i...
Article
To understand the nature and cause of natural climate variability, it is important to attribute past climate variations to particular forcing factors. In this work, our main focus is to introduce an automatic assimilation procedure to estimate the magnitude of strong but short-lived perturbations, such as large explosive volcanic eruptions, using c...
Article
Full-text available
Evaluating natural causes of climate change is vital in order to evaluate the relative impacts of human pollution and land surface modification on climate. We have investigated one of the most important natural causes of climate change, volcanic eruptions, by using 40 ice core records from both Greenland and Antarctica. Our extensive collection of...
Article
Full-text available
1] Previous studies have used small numbers of ice core records of past volcanism to represent hemispheric or global radiative forcing from volcanic stratospheric aerosols. With the largest-ever assembly of volcanic ice core records and state-of-the-art climate model simulations of volcanic deposition, we now have a unique opportunity to investigat...
Article
Full-text available
1] We conducted simulations of the atmospheric transformation and transport of the emissions of the 1783–1784 Laki basaltic flood lava eruption (64.10°N, 17.15°W) using the NASA Goddard Institute for Space Studies modelE climate model coupled to a sulfur cycle chemistry model. The model simulations successfully reproduced the aerosol clouds of the...
Article
Full-text available
[ 1] We combined 33 ice core records, 13 from the Northern Hemisphere and 20 from the Southern Hemisphere, to determine the timing and magnitude of the great Kuwae eruption in the mid-15th century. We extracted volcanic deposition signals by applying a high-pass loess filter to the time series and examining peaks that exceed twice the 31 year runni...
Article
We combined 20 ice core records, 10 from the Northern Hemisphere and 10 from the Southern Hemisphere to determine the timing and magnitude of the Great Kuwae Eruption in the mid-15th century. The volcanic deposition signals were extracted by applying a high pass loess filter to each time series and examining peaks that exceed twice the 30-yr runnin...
Article
Using the state of the art Goddard Institute for Space Studies (GISS) modelE general circulation model, simulations were conducted of the chemistry and transport of aerosols resulting from the 1783-84 Laki (64°N) flood lava eruption. A set of 3 ensemble simulations from different initial conditions were conducted by injecting our estimate of the SO...
Article
Full-text available
Over the past century, the northeast United States experienced several major droughts, with great economic damage as a consequence. Drought indices, such as the widely used Palmer Drought Severity Index, have been use to detect and monitor droughts with limited success. Here we use a relatively new index, the Standardized Precipitation Index, to st...

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