Pith Number

pith:PPDC2FNA

pith:2006:PPDC2FNAS2QTATMFMUWHS7SKLH

not attested not anchored not stored refs pending

Comments by William M. Gray (Colorado State University) on the recently published paper in Science by Webster et al., titled "Changes in tropical cyclone number, duration, and intensity in a warming environment." (September 2005, Vol. 309, pp. 1844-1846, www.sciencemag.org)

William Gray

arxiv:physics/0601051 v1 · 2006-01-09 · physics.ao-ph

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{PPDC2FNAS2QTATMFMUWHS7SKLH}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-07-04T14:52:54.668325Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7bc62d15a096a1304d85652c797e4a59d2bbd743c6f097ea32fbf37a611bb40b

Aliases

arxiv: physics/0601051 · arxiv_version: physics/0601051v1 · doi: 10.48550/arxiv.physics/0601051 · pith_short_12: PPDC2FNAS2QT · pith_short_16: PPDC2FNAS2QTATMF · pith_short_8: PPDC2FNA

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/PPDC2FNAS2QTATMFMUWHS7SKLH \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 7bc62d15a096a1304d85652c797e4a59d2bbd743c6f097ea32fbf37a611bb40b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "01e12824047eb2c15d1fa2a3c2c37c316d6ef178e140726f7b3c3bc8a53c9f7a",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "physics.ao-ph",
    "submitted_at": "2006-01-09T22:24:34Z",
    "title_canon_sha256": "f5b9258d933a3af0beb37633a62cadbd51dc3032504681e78ee5c4c4efed0d69"
  },
  "schema_version": "1.0",
  "source": {
    "id": "physics/0601051",
    "kind": "arxiv",
    "version": 1
  }
}