Cloud seeding ≈ Cloud seeding
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Precipitation formation from orographic cloud seeding Open
Throughout the western United States and other semiarid mountainous regions across the globe, water supplies are fed primarily through the melting of snowpack. Growing populations place higher demands on water, while warmer winters and ear…
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Ice nucleation efficiency of AgI: review and new insights Open
AgI is one of the best-investigated ice-nucleating substances. It has relevance for the atmosphere since it is used for glaciogenic cloud seeding. Theoretical and experimental studies over the last 60 years provide a complex picture of sil…
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Review of Advances in Precipitation Enhancement Research Open
This paper provides a summary of the assessment report of the World Meteorological Organization (WMO) Expert Team on Weather Modification that discusses recent progress on precipitation enhancement research. The progress has been underpinn…
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The UAE Cloud Seeding Program: A Statistical and Physical Evaluation Open
Operational cloud seeding programs have been increasingly deployed in several countries to augment natural rainfall amounts, particularly over water-scarce and arid regions. However, evaluating operational programs by quantifying seeding i…
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To what extent can cirrus cloud seeding counteract global warming? Open
The idea of modifying cirrus clouds to directly counteract greenhouse gas warming has gained momentum in recent years, despite disputes over its physical feasibility. Previous studies that analyzed modifications of cirrus clouds by seeding…
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Quantifying snowfall from orographic cloud seeding Open
Significance Cloud seeding to increase winter snowpack in mountains has traditionally been evaluated using precipitation gauges and target/control statistics leading mostly to inconclusive results. Here, an approach employing radar and gau…
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How frequent is natural cloud seeding from ice cloud layers ( < −35 °C) over Switzerland? Open
Clouds and cloud feedbacks represent one of the largest uncertainties in climate projections. As the ice phase influences many key cloud properties and their lifetime, its formation needs to be better understood in order to improve climate…
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Evaluation of the Wyoming Weather Modification Pilot Project (WWMPP) Using Two Approaches: Traditional Statistics and Ensemble Modeling Open
The Wyoming Weather Modification Pilot Project randomized cloud seeding experiment was a crossover statistical experiment conducted over two mountain ranges in eastern Wyoming and lasted for 6 years (2008–13). The goal of the experiment wa…
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Classification of Arctic multilayer clouds using radiosonde and radar data in Svalbard Open
Multilayer clouds (MLCs) occur more often in the Arctic than globally. In this study we present the results of a detection algorithm applied to radiosonde and radar data from an 1-year time period in Ny-Ålesund, Svalbard. Multilayer cloud …
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Is increasing ice crystal sedimentation velocity in geoengineering simulations a good proxy for cirrus cloud seeding? Open
The complex microphysical details of cirrus seeding with ice nucleating particles (INPs) in numerical simulations are often mimicked by increasing ice crystal sedimentation velocities. So far it has not been tested whether these results ar…
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Distinct Change of Supercooled Liquid Cloud Properties by Aerosols From an Aircraft‐Based Seeding Experiment Open
Cloud plays essential roles to Earth's energy balance and hydrological cycle. Its characteristics could be modified by human activities through cloud seeding. However, there is long‐lasting debate whether the cloud seeding can modify the c…
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Seeding of Supercooled Low Stratus Clouds with a UAV to Study Microphysical Ice Processes: An Introduction to the CLOUDLAB Project Open
Ice formation and growth processes play a crucial role in the evolution of cloud systems and the formation of precipitation. However, the initial formation and growth of ice crystals are challenging to study in the real atmosphere resultin…
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Precipitation enhancement in stratocumulus clouds through airborne seeding: sensitivity analysis by UCLALES-SALSA Open
Artificial enhancement of precipitation via hygroscopic cloud seeding is investigated with a numerical large-eddy simulation model coupled with a spectral aerosol–cloud microphysics module. We focus our investigation on marine stratocumulu…
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Cloud Seeding Evidenced by Coherent Doppler Wind Lidar Open
Evaluation of the cloud seeding effect is a challenge due to lack of directly physical observational evidence. In this study, an approach for directly observing the cloud seeding effect is proposed using a 1548 nm coherent Doppler wind lid…
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Comparison between Observed and Simulated AgI Seeding Impacts in a Well-Observed Case from the SNOWIE Field Program Open
A dry-air intrusion induced by the tropopause folding split the deep cloud into two layers resulting in a shallow orographic cloud with a supercooled liquid cloud top at around −15°C and an ice cloud above it on 19 January 2017 during the …
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Advances in the Evaluation of Cloud Seeding: Statistical Evidence for the Enhancement of Precipitation Open
Cloud seeding has been actively carried out across the globe in the past several decades due to the uneven spatial‐temporal distribution of precipitation. The catalytic effects of artificial precipitation enhancement experiments and operat…
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Evaluation of hygroscopic cloud seeding in liquid-water clouds: a feasibility study Open
An airborne cloud seeding experiment was conducted over the eastern coast of Zhejiang, China, on 4 September 2016 during a major international event held in Hangzhou. In an attempt to reduce the likelihood of rainfall onset, a major airbor…
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Further analysis of a snowfall enhancement project in the Snowy Mountains of Australia Open
The first phase of the Snowy Precipitation Enhancement Research Project (SPERP-1) was a confirmatory experiment on winter orographic cloud seeding (Manton et al., 2011). Analysis of the data (Manton and Warren, 2011) found that a statistic…
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Modern and prospective technologies for weather modification activities: Developing a framework for integrating autonomous unmanned aircraft systems Open
This paper builds upon the processes and framework already established for identifying, integrating and testing an unmanned aircraft system (UAS) with sensing technology for use in rainfall enhancement cloud seeding programs to carry out o…
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Microphysical Characteristics and Evolution of Seeded Orographic Clouds Open
The spatial distribution and magnitude of snowfall resulting from cloud seeding with silver iodide (AgI) is closely linked to atmospheric conditions, seeding operations, and dynamical, thermodynamical, and microphysical processes. Here, mi…
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Progressive and Prospective Technology for Cloud Seeding Experiment by Unmanned Aerial Vehicle and Atmospheric Research Aircraft in Korea Open
This study applies a novel cloud seeding method using an unmanned aerial vehicle (UAV) and a research aircraft in Korea. For this experiment, the UAV sprayed a cloud seeding material (calcium chloride), and the aircraft monitored the cloud…
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Macro- and Micro-physical Characteristics of Different Parts of Mixed Convective-stratiform Clouds and Differences in Their Responses to Seeding Open
This study investigates the cloud macro- and micro-physical characteristics in the convective and stratiform regions and their different responses to the seeding for mixed convective-stratiform clouds that occurred in Shandong province on …
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Glaciogenic Seeding of Cold-Season Orographic Clouds to Enhance Precipitation: Status and Prospects Open
This essay is intended to provide stakeholders and news outlets with a plain-language summary of orographic cloud seeding research, new capabilities, and prospects. Specifically, we address the question of whether a widely practiced type o…
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Analysis of aerosol-cloud interactions and their implications for precipitation formation using aircraft observations over the United Arab Emirates Open
Aerosol and cloud microphysical measurements were collected by a research aircraft during August 2019 over the United Arab Emirates (UAE). The majority of science flights targeted summertime convection along the eastern Hajar mountains bor…
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Numerical Simulations of Airborne Glaciogenic Cloud Seeding Using the WRF Model with the Modified Morrison Scheme over the Pyeongchang Region in the Winter of 2016 Open
A model was developed for simulating the effects of airborne silver iodide (AgI) glaciogenic cloud seeding using the weather research and forecasting (WRF) model with a modified Morrison cloud microphysics scheme. This model was used to hi…
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Assessment of the WRF Model as a Guidance Tool Into Cloud Seeding Operations in the United Arab Emirates Open
With the projected expansion of arid/semi‐arid regions in a warming world, precipitation enhancement activities such as cloud seeding will become increasingly popular and relied upon. Due to the inherent costs, a successful planning is cru…
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Evaluation of Orographic Cloud Seeding Using a Bin Microphysics Scheme: Three-Dimensional Simulation of Real Cases Open
The University of Pécs and NCAR Bin (UPNB) microphysical scheme was implemented into the mesoscale Weather Research and Forecast (WRF) Model that was used to study the impact of silver iodide (AgI) seeding on precipitation formation in win…
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Characteristics of Desert Precipitation in the UAE Derived from a Ceilometer Dataset Open
Understanding rainfall in arid and water-scarce regions is central to the efficient use of water resources in agriculture, irrigation, and domestic food security. This work presents a new dataset with which to study precipitation processes…
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Mixed-phase regime cloud thinning could help restore sea ice Open
Cloud geoengineering approaches aim to mitigate global warming by seeding aerosols into clouds to change their radiative properties and ocurrence frequency. Ice-nucleating particles (INPs) can enhance droplet freezing in clouds, reducing t…
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Assessment of Ground-Based and Aerial Cloud Seeding Using Trace Chemistry Open
Targeting seedable clouds with silver iodide in complex terrain adds considerable uncertainty in weather modification studies. This study explores the geographic and temporal distribution of silver iodide associated with an active cloud se…