Dr. Jens Hartmann

Methodology focus

Professor at the University of Hamburg Institute of Geology. Leading researcher on the global silicate-weathering sink and on sensor-level MRV for enhanced weathering. His electrical-conductivity-proxy research is the kind of per-field signal that proof packs aggregate.

Trellison / LedgerWell intersection. Sensor + data standards for a nascent market.

Affiliation

University of Hamburg

Role

Professor

Axis

Nature-Based MRV

Tier

Tier 3

Selected publications

Multiple — Silicate weathering and global carbon cycle papers. multiple venues.
Ongoing — ERW sensor and proxy measurement papers. multiple venues.

Alignment with proof packs

Their methodology / role	Proof-pack / Trellison fit
EC-proxy measurement for ERW	Proof-pack ERW schema includes EC time-series fields
Global weathering sink baseline	Proof-pack regional baselining

Collaboration concepts

Concept 1

EC-proxy proof-pack schema extension

Add Hartmann's EC-proxy method as a proof-pack ERW field.

Concept 2

Hamburg / Trellison joint ERW benchmark

Multi-site ERW benchmark with sensor-level proof packs.

Outreach approach

Proposed opening message

Subject: A multi-scale MRV composition engine for your work

Dear Jens Hartmann,

Your multi-method MRV framework for nature-based carbon removal has been a design reference for a per-tonne open-data verification instrument that Trellison Institute has been building. We call the artefact a proof pack.

I would welcome a 30-minute conversation to show you the current alpha. We are not asking for endorsement; we are asking for methodology critique and, if useful, an offer of alpha access for your active work. Independent negative evaluations would be published alongside positive ones.

A one-page methodology brief that maps your work to proof-pack schema fields — with gaps flagged honestly — is attached.

With respect,
Rob Stillwell
Director, Trellison Institute

What we do not ask for

Endorsement of Trellison, LedgerWell, DaedArch, or any affiliated entity.
Exclusivity or first-look rights on research findings.
Unpaid labour. Any advisor role is compensated with a modest honorarium and disclosed on the record.

Disclosure: Compiled from public sources through April 2026. Inclusion does not imply endorsement, affiliation, or reciprocal interest. Corrections: About.

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