Carbon Sky Index | N656PS Citation SII — Emissions Profile

N656PS

•

Cessna Citation SII

United States

SIY (Siskiyou County Airport, Montague)

Add to
Watchlist

Pro

Download
CSV

Soon

Bookmark
Aircraft

Free

Viewing period:

Compared to: preceding 12 months · Apr 2024 – Apr 2025

Apr 2025 – Mar 2026·vs Apr 2024 – Apr 2025·↓ Emissions decreasing vs prior period

Emissions Overview

2.2

Tons CO₂ This Month

Below Average0.5× avg for Citation SII

2.2

Tons CO₂ YTD

Below Average0.2× avg for Citation SII

9.6

CO₂ Tons Since 2025

Below Average0.2× avg for Citation SII

Emissions Intensity0.00t CO₂/nmBelow Average0.6× avg for Citation SII

3.6 tons CO₂ in selected period

2026 pace: On track for approximately 9t CO₂ by year end · ↑ 19% vs full year 2025 (7t)

Flight Patterns & Behaviour

Activity broadly consistent with prior period — averaging 0.3t CO₂/month

0.3t

CO₂/month

1.8t

Avg per flight

Distinct routes

Highly Concentrated2 routes account for 100% of total emissions

Highest emission route

Montague → Oxnard

2.2t CO₂ total · 0.0045t CO₂/nm

Seasonal pattern: Historically peaks in March · Current month is 38% below March 2025

🇺🇸United States·16202 aircraft tracked·Ranked 1st by emissions among 109 countries·0.0× country averageBelow Average

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

What's ChangedCompared to prior equivalent period

Emissions

↓ 35%

6t → 4t CO₂

Intensity

↓ 7%

0.0049 → 0.0046 t CO₂/nm

New Routes

4t CO₂ combined

Dropped Routes

↓ 3

Prior period only

Avg per Flight

↓ 3%

1.9t → 1.8t

Flight Count

↓ 1

3 → 2 flights

Route and airport counts may include data processing artefacts.

Spikes

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

CO₂ Above Baseline

Signals Detected

Highest Severity

High

Emissions

High

New17 Mar 2026 · Montague → Oxnard

Highest single-flight emission event (Montague → Oxnard)

Single flight: 2.2t CO₂ — 60% of period emissions

Aircraft

Medium

Historical19 Jul 2025 – 17 Mar 2026

241-day inactive period

2.2t CO₂ in the 7 days following resumption

Recent Flights

Mar 17, 20262.2t CO₂

KSIYMontague

KOXROxnard

552 miles1h 33m

View Details

Jul 19, 20251.4t CO₂

KMCCSacramento

KBURBurbank

351 miles1h 7m

View Details

Mar 23, 20252.6t CO₂

KHHRHawthorne

KSIYMontague

587 miles1h 47m

View Details

Mar 18, 20250.5t CO₂

KMYFSan Diego

KHHRHawthorne

103 miles32m

View Details

Feb 1, 20252.5t CO₂

KSIYMontague

KSNASanta Ana

613 miles1h 43m

View Details

Top Airports by Emissions

Montague

KSIY

Total CO₂

2.2t

Total Visits

Avg CO₂/visit

2.2t

KOXR

Total CO₂

2.2t

Total Visits

Avg CO₂/visit

2.2t

KMCC

Total CO₂

1.4t

Total Visits

Avg CO₂/visit

1.4t

KBUR

Total CO₂

1.4t

Total Visits

Avg CO₂/visit

1.4t

Top Routes by Emissions

Montague Oxnard

KSIY to KOXR• 553 miles

Total Flights

Avg CO₂/Flight

2.2t

Total Emissions

2.2t CO₂

KMCC to KBUR• 352 miles

Total Flights

Avg CO₂/Flight

1.4t

Total Emissions

1.4t CO₂

Page 1 of 1