Atmospheric Pressure Explained Simply — Part 1 | DGCA CPL ATPL Meteorology Ch 2 | Capt.CoalField

JOIN THE WHATSAPP STUDY GROUP https://chat.whatsapp.com/KF4QZpRdDnH... Doubts, discussion, free notes. INSTAGRAM @capt.coalfield | @idk.akarsh ————— Chapter 2 — Atmospheric Pressure, Pressure Systems & Altimetry | PART 1 This is the first half of Chapter 2. We build pressure from the ground up — what it actually is, why it falls as you climb, and why cold air and warm air behave so differently. No formulas thrown at you. Cause and effect, in plain language. Reference: ICJ (IC Joshi Meteorology), Chapter 2. ──────────────────────────── WHAT'S COVERED IN PART 1 ──────────────────────────── What pressure really is — air is heavy stuff, not "nothing" Static Pressure vs Dynamic Pressure — and why your altimeter, VSI and ASI each need a different one Pressure as the weight of the air column above you Units — hPa, millibar, bar, mm, inches. Why so many, and how they relate 1013.25 hPa = 760 mm = 29.92 in Why pressure falls with height — and why it falls at a DECREASING rate 1 hPa in feet: 27 ft at MSL, 30 ft at 2,000, 50 ft at 20,000, 100 ft at 40,000 The 96 T / p relationship — read as a story, not memorised as a formula Warm air vs cold air columns — why pressure surfaces SAG over cold air and BULGE over warm air Why cold air gives HIGH pressure at the surface but LOW pressure aloft (the contradiction that confuses almost every student) ──────────────────────────── COMING IN PART 2 ──────────────────────────── Semi-diurnal variation · Measurement and instruments · Alticor and D-value · Contours and Thickness · Pressure gradient · Pressure tendency and Isallobars · ALTIMETRY — QFE, QNH, QFF, QNE, Regional QNH · Transition Altitude and Level · Standard isobaric levels · Over-reading and under-reading · Pressure patterns — Low, Trough, High, Ridge, Col ──────────────────────────── TIMESTAMPS ──────────────────────────── 00:00 Intro — why this chapter matters [fill in] What pressure actually is [fill in] Static and Dynamic Pressure [fill in] Pressure as weight of the air column [fill in] Units and conversions [fill in] Why pressure falls with height [fill in] Feet per hPa — 27, 30, 50, 100 [fill in] The 96 T / p relationship [fill in] Warm columns and cold columns [ ──────────────────────────── QUESTION BANK ──────────────────────────── The question bank for this chapter is in a SEPARATE playlist. Every question is worked through the same way — the correct answer, why it is correct, why each other option is wrong, and the concept it connects back to. Watch the notes first. Then the QB. That order works better. → [QB PLAYLIST LINK] ──────────────────────────── DISCLAIMER ──────────────────────────── Feel free to share this. No terms, no conditions, nothing to sign. If it helps someone, send it to them. Aviation training in India needs to be decentralised, and that only happens if material moves freely. The YouTube channel Capt. Coalfield is no longer owned by Kumar. Uploads are made per Agreement GRN No. 2504039876. Please do not learn this by heart. Ask Why, ask What, ask How. If a printed answer looks wrong, work out what the book meant, what is actually true, and what to write in the exam — those are three different skills and you need all three. And do not rely on AI alone. Verify against your book and your instructor. Including this. ──────────────────────────── LAST WORD ──────────────────────────── Thank you to the channel members, and to the strangers who have written in over the last few months — some of you have caught errors I would never have found alone. Feedback and corrections: capt.coalfield@gmail.com Replies are slow. Digital detox is a real thing and I am bad at email. If this helped you, help someone else — a colleague, a friend, a stranger in the briefing room. I believe in karma. And spend time with the people who love you, your parents especially. The syllabus will still be here tomorrow. NOT FOR PROFIT — SLEEPY NOTES #DGCA #CPL #ATPL #Meteorology #AviationMeteorology #AtmosphericPressure #DGCAExam #PilotTraining #GroundSchool #SleepyNotes #CaptCoalfield #ICJoshi #AviationWeather #PilotLife #IndianAviation #DGCA #Meteorology #CPL #ATPL #AviationMeteorology #AtmosphericPressure #DGCAExam #PilotTraining #GroundSchool #SleepyNotes #CaptCoalfield #ICJoshi #AviationWeather #PilotLife #IndianAviation