Statistical Properties of ENI CG/IC Flashes Relative to NLDN CG Flashes over CONUS 01/05/2015 Jess...
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Transcript of Statistical Properties of ENI CG/IC Flashes Relative to NLDN CG Flashes over CONUS 01/05/2015 Jess...
![Page 1: Statistical Properties of ENI CG/IC Flashes Relative to NLDN CG Flashes over CONUS 01/05/2015 Jess Charba MDL LAMP* convection/lightning leader Judy Ghirardelli.](https://reader035.fdocuments.us/reader035/viewer/2022081603/56649d755503460f94a559ad/html5/thumbnails/1.jpg)
Statistical Properties of ENI CG/IC Flashes Relative to NLDN
CG Flashes over CONUS01/05/2015
Jess Charba MDL LAMP* convection/lightning leader Judy Ghirardelli MDL LAMP manager/leader
Fred Samplatsky MDLAndy Kochenash MDL
Phil Bothwell SPCChris Sloop ENI
Statistical Properties of ENI CG/IC Flashes Relative to NLDN
CG Flashes over CONUS01/05/2015
Jess Charba MDL LAMP* convection/lightning leader Judy Ghirardelli MDL LAMP manager/leader
Fred Samplatsky MDLAndy Kochenash MDL
Phil Bothwell SPCChris Sloop ENI
AMS 7th
Conference on Meteorological Applications of Lightning Data
* LAMP = Localized Aviation MOS Program developed by MDL
![Page 2: Statistical Properties of ENI CG/IC Flashes Relative to NLDN CG Flashes over CONUS 01/05/2015 Jess Charba MDL LAMP* convection/lightning leader Judy Ghirardelli.](https://reader035.fdocuments.us/reader035/viewer/2022081603/56649d755503460f94a559ad/html5/thumbnails/2.jpg)
• Cloud-to-ground (CG) flashes Provided by National Lightning Detection Network (NLDN / Vaisala, Inc)
since 1989
Provided by Earth Networks, Inc (ENI) since 2009
• Total lightning (TL) data Consist of separate CG and in-cloud (IC) flashes Provided by ENI since ~ 2009 Provided more recently by Vaisala*
* Vaisala IC data not included in study …MDL did not have access to an archive
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What Types of Lightning Data Exist over CONUS?
![Page 3: Statistical Properties of ENI CG/IC Flashes Relative to NLDN CG Flashes over CONUS 01/05/2015 Jess Charba MDL LAMP* convection/lightning leader Judy Ghirardelli.](https://reader035.fdocuments.us/reader035/viewer/2022081603/56649d755503460f94a559ad/html5/thumbnails/3.jpg)
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What Questions Were Addressed in Study?
• How do recent NLDN and ENI CG statistics compare? Have recent CG data evolved over time?
• How do recent ENI CG and IC statistics compare? Have recent data evolved over time?
These questions are important to NWS because – Accurate, stable data are needed for forecast/warning and modelling
applications
![Page 4: Statistical Properties of ENI CG/IC Flashes Relative to NLDN CG Flashes over CONUS 01/05/2015 Jess Charba MDL LAMP* convection/lightning leader Judy Ghirardelli.](https://reader035.fdocuments.us/reader035/viewer/2022081603/56649d755503460f94a559ad/html5/thumbnails/4.jpg)
• NLDN and ENI samples = Jan 2012 to present
• Consider major ENI upgrades 04 Jun 2013
04 Jun 2014
• Data analysis Flash counts tabulated in 10 km gridboxes by day (12z - 12z)
Study restricted to warm season (Apr – Sep)
• Warm season sub-divisions “Before Jun 2013 ENI upgrade”
“Btwn Jun 2013 and 2014 ENI upgrades”
“After Jun 2014 ENI upgrade”
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Data Samples/Stratifications Used in Study
![Page 5: Statistical Properties of ENI CG/IC Flashes Relative to NLDN CG Flashes over CONUS 01/05/2015 Jess Charba MDL LAMP* convection/lightning leader Judy Ghirardelli.](https://reader035.fdocuments.us/reader035/viewer/2022081603/56649d755503460f94a559ad/html5/thumbnails/5.jpg)
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Mean Daily CG Count Full warm seasons of 2012 - 2014
NLDN ENINLDN CG coverage is less than for ENI
![Page 6: Statistical Properties of ENI CG/IC Flashes Relative to NLDN CG Flashes over CONUS 01/05/2015 Jess Charba MDL LAMP* convection/lightning leader Judy Ghirardelli.](https://reader035.fdocuments.us/reader035/viewer/2022081603/56649d755503460f94a559ad/html5/thumbnails/6.jpg)
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Grid boundary
Flash Count Tabulation Grid and
“CONUS” Aggregating Area
“CONUS” aggregating area
![Page 7: Statistical Properties of ENI CG/IC Flashes Relative to NLDN CG Flashes over CONUS 01/05/2015 Jess Charba MDL LAMP* convection/lightning leader Judy Ghirardelli.](https://reader035.fdocuments.us/reader035/viewer/2022081603/56649d755503460f94a559ad/html5/thumbnails/7.jpg)
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NLDN and ENI Daily CG Count over CONUS
Date period = +/- 30 days from ENI upgrade dates
04 Jun 2013 ENI upgrade
04 Jun 2014 ENI upgrade
ENI much higher before 2013 upgrade …slightly higher afterward
ENI slightly lower after 2014 upgrade
![Page 8: Statistical Properties of ENI CG/IC Flashes Relative to NLDN CG Flashes over CONUS 01/05/2015 Jess Charba MDL LAMP* convection/lightning leader Judy Ghirardelli.](https://reader035.fdocuments.us/reader035/viewer/2022081603/56649d755503460f94a559ad/html5/thumbnails/8.jpg)
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Mean Daily CG Count
Before June 2013 ENI upgrade
ENINLDNENI much higher
![Page 9: Statistical Properties of ENI CG/IC Flashes Relative to NLDN CG Flashes over CONUS 01/05/2015 Jess Charba MDL LAMP* convection/lightning leader Judy Ghirardelli.](https://reader035.fdocuments.us/reader035/viewer/2022081603/56649d755503460f94a559ad/html5/thumbnails/9.jpg)
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NLDN ENIENI slightly lower
Mean Daily CG Count
After June 2014 ENI upgrade
![Page 10: Statistical Properties of ENI CG/IC Flashes Relative to NLDN CG Flashes over CONUS 01/05/2015 Jess Charba MDL LAMP* convection/lightning leader Judy Ghirardelli.](https://reader035.fdocuments.us/reader035/viewer/2022081603/56649d755503460f94a559ad/html5/thumbnails/10.jpg)
Mean Daily NLDN and ENI CG Count over CONUS
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Before Jun 2013 ENI upgrade After Jun 2014 ENI upgradeBwtn Jun 2013- 2014 ENI upgrades
![Page 11: Statistical Properties of ENI CG/IC Flashes Relative to NLDN CG Flashes over CONUS 01/05/2015 Jess Charba MDL LAMP* convection/lightning leader Judy Ghirardelli.](https://reader035.fdocuments.us/reader035/viewer/2022081603/56649d755503460f94a559ad/html5/thumbnails/11.jpg)
Mean Absolute Difference of ENI and NLDN Daily CG over CONUS
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Before Jun 2013 ENI upgrade Bwtn Jun 2013- 2014 ENI upgrades After Jun 2014 ENI upgrade
![Page 12: Statistical Properties of ENI CG/IC Flashes Relative to NLDN CG Flashes over CONUS 01/05/2015 Jess Charba MDL LAMP* convection/lightning leader Judy Ghirardelli.](https://reader035.fdocuments.us/reader035/viewer/2022081603/56649d755503460f94a559ad/html5/thumbnails/12.jpg)
RMS Difference of ENI and NLDN Daily CG over CONUS
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Before Jun 2013 ENI upgrade Bwtn Jun 2013- 2014 ENI upgrades After Jun 2014 ENI upgrade
![Page 13: Statistical Properties of ENI CG/IC Flashes Relative to NLDN CG Flashes over CONUS 01/05/2015 Jess Charba MDL LAMP* convection/lightning leader Judy Ghirardelli.](https://reader035.fdocuments.us/reader035/viewer/2022081603/56649d755503460f94a559ad/html5/thumbnails/13.jpg)
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ENI Daily IC vs CG Count over CONUS
Date period = +/- 30 days about ENI upgrades
04 Jun 2013 ENI upgrade
04 Jun 2014 ENI upgrade
IC slightly higher before 2013 upgrade … ~ 4 X higher afterward
IC avg ~ 8 X higher after 2014 upgrade
![Page 14: Statistical Properties of ENI CG/IC Flashes Relative to NLDN CG Flashes over CONUS 01/05/2015 Jess Charba MDL LAMP* convection/lightning leader Judy Ghirardelli.](https://reader035.fdocuments.us/reader035/viewer/2022081603/56649d755503460f94a559ad/html5/thumbnails/14.jpg)
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Mean of ENI Daily IC/CG
Before June 2013 upgrade After June 2014 upgrade
![Page 15: Statistical Properties of ENI CG/IC Flashes Relative to NLDN CG Flashes over CONUS 01/05/2015 Jess Charba MDL LAMP* convection/lightning leader Judy Ghirardelli.](https://reader035.fdocuments.us/reader035/viewer/2022081603/56649d755503460f94a559ad/html5/thumbnails/15.jpg)
Daily Mean ENI IC and CG Count over CONUS
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Before Jun 2013 ENI upgrade Bwtn Jun 2013- 2014 ENI upgrades After Jun 2014 ENI upgrade
![Page 16: Statistical Properties of ENI CG/IC Flashes Relative to NLDN CG Flashes over CONUS 01/05/2015 Jess Charba MDL LAMP* convection/lightning leader Judy Ghirardelli.](https://reader035.fdocuments.us/reader035/viewer/2022081603/56649d755503460f94a559ad/html5/thumbnails/16.jpg)
• ENI warm season CG counts were generally - Much higher than NLDN CG counts before June 2013 ENI upgrade Slightly higher than NLDN CG counts between 2013 and 2014 ENI upgrades Slightly lower than NLDN CG counts since June 2014 ENI upgrade
Note: Possible evolution of NLDN CG counts during this period is not known
• ENI warm season IC versus CG counts – IC slightly higher before June 2013 upgrade IC ~ 4 times higher between 2013 and 2014 upgrades IC ~ 7 times higher since June 2014 ENI upgrade
Note: True IC versus CG counts are not known
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Summary of Findings
![Page 17: Statistical Properties of ENI CG/IC Flashes Relative to NLDN CG Flashes over CONUS 01/05/2015 Jess Charba MDL LAMP* convection/lightning leader Judy Ghirardelli.](https://reader035.fdocuments.us/reader035/viewer/2022081603/56649d755503460f94a559ad/html5/thumbnails/17.jpg)
• ENI upgrade in June 2013 has greatly improved CG flash count consistency with NLDN CG counts over CONUS
• ENI upgrades in 2013 and 2014 have greatly increased IC flash counts over CONUS
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Conclusions
![Page 18: Statistical Properties of ENI CG/IC Flashes Relative to NLDN CG Flashes over CONUS 01/05/2015 Jess Charba MDL LAMP* convection/lightning leader Judy Ghirardelli.](https://reader035.fdocuments.us/reader035/viewer/2022081603/56649d755503460f94a559ad/html5/thumbnails/18.jpg)
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Questions ?