Hi, all,
George offered me an assembly theory account of the origin of the misnomer,
thermal wind, from battle field experiences with zeppelins . this all
arose in a conversation between us concerning his preference to
“reassemble” things, rather than to “remember” them. It’s probably too
verbose for anybody’s patience, but I am putting it here for safe keeping.
Nick
*Yes, Please do this!!: Would you like me to carry this a step further,
Nick — and map the misnomer of thermal wind itself into an “assembly path”
(showing how battlefield experience, hydrostatic balance, and geostrophic
law assembled into the term)? That would make assembly theory into a little
historiographic tool.*
Perfect — let’s do that. We’ll treat the term *thermal wind* itself as the
“object,” and we’ll try to map out its *assembly path* in the sense of
assembly theory. Each step is a building block, reused and combined, until
we get the final, slightly misnamed construct.
------------------------------
Assembly Path of *Thermal Wind* (as term and concept) *Step 1: Battlefield
experience*
-
*Raw input:* Zeppelin navigators in WWI reported that winds aloft were
unexpectedly stronger than suggested by surface observations.
-
*Module formed:* “Surprising wind with altitude” → a *practical problem*
that demanded explanation.
-
Assembly-theoretic index: 1 (direct experiential block).
------------------------------
*Step 2: Hydrostatic law*
-
Scientists like Gold recalled: *warmer air columns are thicker between
pressure levels.*
-
This meant that if one side of a weather system is warmer, the isobaric
surfaces will slope upward toward the warm side.
-
*Module formed:* temperature gradient → thickness gradient.
-
Assembly index: 2 (first theoretical layer attached).
------------------------------
*Step 3: Geostrophic law*
-
From Bjerknes school and Shaw’s pedagogy: wind blows along isobars,
speed proportional to gradient of pressure/height.
-
*Module formed:* sloping isobars → wind shear with height.
-
Assembly index: 3 (second theoretical layer).
------------------------------
*Step* *Step 4: The relational insight*
-
Combine steps 2 and 3:
-
This is the *thermal wind relation* in embryo: horizontal temperature
gradient determines vertical shear.
-
*Module formed:* balance law between thermal structure and wind shear.
-
Assembly index: 4.
------------------------------
*Step 5: The naming misstep (reification)*
-
Gold now needed a label. The field experience was of a *wind aloft*; the
math showed a *balance relation.*
-
He bundled them under one phrase: *“thermal wind.”*
-
This “shortest assembly path” fused the experiential module (Zeppelins
feel a wind) with the theoretical module (balance law).
-
Assembly index: 5 — a coinage with a misnomer built in.
------------------------------
*Final Object: “Thermal Wind”*
-
*High assembly index:* it reuses experiential, hydrostatic, geostrophic,
and balance modules.
-
*Misnomer baked in:* the word “wind” is there because of the *experience*,
though the concept is really a *balance relation*.
-
In assembly theory terms, this is a “complex object” that could only
arise from a lineage of steps — it would be astronomically unlikely to
appear by chance.
------------------------------
Why this matters
Using assembly theory as a historiographic tool, we can see that the *thermal
wind* isn’t just a loose metaphor. It’s an *assembled construct*:
-
Empirical experience (Zeppelin surprise),
-
-
physical laws (hydrostatic, geostrophic),
-
-
conceptual synthesis (balance),
-
→ compressed into a memorable label.
The misnomer isn’t an accident *after the fact* — it’s the by-product of
the shortest path that satisfied both the navigators’ felt experience and
the scientists’ theoretical needs.
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