N2SM
Bombardier Learjet 31
United States
SEE (Gillespie Field, San Diego/El Cajon)

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Viewing period:
Compared to: preceding 12 months · Apr 2024 – Apr 2025
Apr 2025 – Mar 2026·vs Apr 2024 – Apr 2025

Emissions Overview

1.7
Tons CO2 This Month
Below Average0.3× avg for Learjet 31
4.0
Tons CO2 YTD
Below Average0.2× avg for Learjet 31
38.5
CO2 Tons Since 2025
Below Average0.4× avg for Learjet 31
Emissions Intensity0.02t CO₂/nmAbove Average3.1× avg for Learjet 31
33.8 tons CO2 in selected period

2026 pace: On track for approximately 16t CO₂ by year end · ↓ 54% vs full year 2025 (35t)

Flight Patterns & Behaviour

Activity broadly consistent with prior period — averaging 2.4t CO₂/month

2.4t
CO₂/month
2.1t
Avg per flight
5
Distinct routes
Highly Concentrated3 routes account for 91% of total emissions
Highest emission route
San Diego/El Cajon → Afton
17.9t CO₂ total · 0.0034t CO₂/nm
🇺🇸United States·16202 aircraft tracked·Ranked 1st by emissions among 109 countries·0.1× country averageBelow Average

Subject to FAA oversight — no mandatory carbon reporting for private aviation

What's ChangedCompared to prior equivalent period
Emissions
Prior data unavailable
Intensity
Prior data unavailable
New Routes
3
11t CO₂ combined
Dropped Routes
0
Avg per Flight
Prior data unavailable
Flight Count
Prior data unavailable

Route and airport counts may include data processing artefacts.

Spikes

Significant deviations from this aircraft's baseline in the selected period.

CO₂ Above Baseline

18t

Signals Detected

5

Highest Severity

Medium

Aircraft
Medium
New19 Nov – 3 Dec 2025
Elevated activity period · 3 flights in 14 days vs baseline of 1
Contributed approximately 6t CO₂ to period total — 22% of period emissions
Aircraft
Medium
Historical12 Jul – 31 Aug 2025
50-day inactive period
2.1t CO₂ in the 7 days following resumption
Aircraft
Medium
Historical31 Aug – 16 Sept 2025
16-day inactive period
3.0t CO₂ in the 7 days following resumption
Aircraft
Medium
Historical16 Sept – 7 Oct 2025
21-day inactive period
4.2t CO₂ in the 7 days following resumption
Aircraft
Medium
Historical8 Oct – 22 Oct 2025
15-day inactive period
1.9t CO₂ in the 7 days following resumption
Recent Flights
Jan 9, 20262.3t CO₂
KSEESan Diego/El Cajon
KAFOAfton
757 miles1h 36m
Dec 3, 20252.3t CO₂
KSEESan Diego/El Cajon
KAFOAfton
757 miles1h 37m
Nov 29, 20252.8t CO₂
KHIOPortland
KSEESan Diego/El Cajon
934 miles1h 53m
Nov 25, 20251.4t CO₂
KHIOPortland
KDIJDriggs
595 miles1h 6m
View Details
Nov 23, 20252.3t CO₂
KSEESan Diego/El Cajon
KAFOAfton
757 miles1h 35m
View Details
Nov 12, 20252.0t CO₂
KSEESan Diego/El Cajon
KAFOAfton
757 miles1h 25m
View Details
Oct 22, 20251.9t CO₂
KSEESan Diego/El Cajon
KAFOAfton
757 miles1h 24m
View Details
Oct 8, 20251.6t CO₂
KHIOPortland
KDIJDriggs
595 miles1h 12m
View Details
Oct 7, 20250.7t CO₂
KHIOPortland
NaN miles41m
View Details
Oct 7, 20251.8t CO₂
KHIOPortland
KBMCBrigham City
610 miles1h 20m
View Details
Sep 16, 20253.0t CO₂
KHIOPortland
KSEESan Diego/El Cajon
934 miles1h 59m
View Details
Aug 31, 20252.1t CO₂
KSEESan Diego/El Cajon
KAFOAfton
757 miles1h 29m
View Details
Jul 12, 20252.4t CO₂
KSEESan Diego/El Cajon
KAFOAfton
757 miles1h 38m
View Details
Jul 1, 20252.7t CO₂
KSEESan Diego/El Cajon
KAFOAfton
757 miles1h 49m
View Details
Mar 16, 20252.1t CO₂
KSEESan Diego/El Cajon
KAFOAfton
757 miles1h 30m
View Details
Jan 9, 20252.6t CO₂
KSEESan Diego/El Cajon
KAFOAfton
757 miles1h 45m
View Details
Top Airports by Emissions
San Diego/El Cajon

San Diego/El Cajon

KSEE

Total CO₂

23.6t

Total Visits

10

Avg CO₂/visit

2.4t

Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Jan
Feb
Mar
Afton

Afton

KAFO

Total CO₂

17.9t

Total Visits

8

Avg CO₂/visit

2.2t

Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Jan
Feb
Mar
Portland

Portland

KHIO

Total CO₂

11.3t

Total Visits

6

Avg CO₂/visit

1.9t

Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Jan
Feb
Mar
Driggs

Driggs

KDIJ

Total CO₂

3.0t

Total Visits

2

Avg CO₂/visit

1.5t

Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Jan
Feb
Mar
Brigham City

Brigham City

KBMC

Total CO₂

1.8t

Total Visits

1

Avg CO₂/visit

1.8t

Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Jan
Feb
Mar
Top Routes by Emissions
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